2.9

Roy Erickson

Mathematics - College of the Canyons

2.9
Quality
3.5
Difficulty
44%
Would Retake
123
Reviews
2.9
Quality
3.5
Difficulty
2.9
Helpful
2.8
Clarity

44%

Would Retake

123

Reviews

Rating Distribution
Official

5

33

4

15

3

18

2

23

1

34

What Students Say

On top of all that, check out his conspiracy website "mymathmantra"

MATH240 - 1.0 rating

This guy should have been aborted

MATH214 - 1.0 rating
Class Info

Online Classes

100%

Attendance Mandatory

73%

Textbook Required

0%

Grade Predictor

Your expected effort level

LowHigh

Predicted Grade

B+

95% confidence
Based on 68 grades
Most common grades:
A (25)
A+ (11)
B (10)
Grade Distribution
A(36)B(11)C(9)D(2)F(1)A-/B+(11)
Based on 78 reported grades
A: 25
A+: 11
B: 10
A-: 7
Common Tags
Lots of homework (33)
Lecture heavy (20)
Caring (12)
Test heavy (12)
Skip class? You won't pass. (11)
Clear grading criteria (8)
Get ready to read (7)
Gives good feedback (7)
Rating Trend

Declining

-0.24 avg change
Mar
Apr
May
Jun
Aug
Dec
Last 6 months
Ratings by Course

MATH130

5.0

(1)

GEOM083

5.0

(1)

MATH070

5.0

(5)

MATH227

5.0

(1)

MATHV21B

4.0

(1)
+19 more courses
Difficulty by Course

ALG070

5.0

GEOMEMATH

5.0

GEO083

5.0

104

4.0

MATH83

4.0

Reviews (123)
3.0
2.0
MATH060
Dec 19, 2005

Erickson was difficult to get use too. At first I had to teach myself from the book before I understood his teaching meathods. You have to keep your notes in a seperate note book that he checks occasionally. Tests were pretty easy, as long as you do well on your test you will do fine in the class.

4.0
2.0
MATH140STATS
Jun 1, 2006

His teaching method is not very clear or logical in that he will show every way to solve a certain problem, which leaves the student confused. He has a lot of small quizes which serve as tests, and homework is required. You must do it to pass the tests. Overall he's ok, but buy the solutions manual cuz you'll need it. You won't learn much in class.

2.0
4.0
MATH140
Jun 8, 2006

He's very intelligent and seems to know a good deal deal about math and engineering,BUT he just can't present it in a way that makes it possible for other people to learn. He assigns too many daily homework problems-unaware of the time that is required to complete even one stats problem. 10 "quizzes"(aka tests). stats project=killer!

1.0
5.0
ALG070
Dec 26, 2007

Alright, listen. DO NOT TAKE THIS CLASS. If your already signed up for it, drop it. Stay an extra semester if necessary. I'm telling you to get my "B" I worked four-five hours a day. In class, then studying the book and at the tlc lab. He is terrible at explaining, confusing and absolutely useless. I'm sure he would make a great accountant somewher

4.0
3.0
MATH140
Jan 27, 2008

Though he likes to tell stories and is a bit eccentric, overall he is a good instructor. To be sucessful, you must attend regularly and pay attention. Ask questions. If you don't he can't help. I think many of the negative comments come from those who would prefer to sleep in class and have a grade handed to them. Your in college, grow up a bit.

4.0
3.0
MATHV21B
Feb 2, 2008

Mr. Erickson is down to earth, approachable, and unique. He is very smart and above our level. But, learning is also the student's responsibility. Be proactive and open line of communication. Fulfill all the requirements of the class even the extra credits. Apply tips on how to succeed in Math especially the higher ones. He will grade accordingly.

1.0
5.0
MATH103
Jul 3, 2008

No, no, no and NO! Do not take this class ever with him. He goes off on tangents about nothing. He doesn't like to memorize formulas. He likes to think of another way to solve it. If you don't solve the problem the way he likes to with long unneccessary steps, you get marked down on quizes. The amount of work was ridiculous. NO!

5.0
3.0
MATH130
Aug 8, 2008

If you want to learn, and are willing to go to class... Take his class! He knows how to make you want to use the data you learn by showing you how to apply it in other fields rather than just math class. Really nice guy, and if you do all the work, you can get an A.

5.0
2.0
MATH103
Jun 22, 2009

his class was a very easy class as long as you did the homework. There was not much homework but what he gave really helped to teach the material. Take his class. He is funny in a goofy way and he keeps the class moving.

5.0
1.0
MATH103
Jun 22, 2009

Dont listen to anyone who said anything negative about Mr. Erickson.This class was so easy & fun.Me & my bf both got A's.Im almost positive a majority of the class did.He makes everything so clear & has great review for the midterm & final. Take his class. Trust me I have never done well in any class except this one. Its almost impossible to fail!

5.0
2.0
MATH103
Aug 26, 2009

Great professor overall. I hesitate on putting that he is an "Easy" professor, but he is very fair. The homework was never very large, he cut off a lot of the homework that was just busy work and just had people do what was necessary. I highly recommend him, he truly does care about helping you out and is a really great guy in general. Best of luck

4.0
4.0
MATH103
Dec 11, 2009

An extremly nice guy who truly cares about his students. He is bad at answering e-mails but genuinly tries to help. The only problem is that he is too smart and does not know how to put things in simpler terms for students to understand. If you are generally good at math and can teach yourself then go for it, but if you struggle find someone else

3.0
4.0
MATH103
Jan 24, 2010

He is a really nice guy and funny at times. He does have a problem of going off subject frequently to talk about certain subjects. If you can understand math easily I suggest you take him. Otherwise, if you struggle, he's not the guy to take.

5.0
3.0
MATH103
Feb 2, 2010

Great professor, goes off subject sometimes. But if you take notes in his class and pay attention the whole class you will do good on tests. After taking his class I actually understood algebra and liked doing problems. Be prepared to work and it will pay off.

2.0
5.0
MATH104
Jun 7, 2010

You would need to teach yourself if you took his precalculus class. His lectures are off topic and irrelevant.

2.0
4.0
MATH103
Jun 8, 2010

up until this class i was beginning to like math and now I don?t really care to touch it with ta ten foot pole. Erickson would go off subject every day (literally) and was never really clear on what he wanted us to study. I am not a lazy student (3.7GPA) but after this class I have a nice ?C? on my transcripts

2.0
1.0
MATH083
Sep 20, 2010

He is alright I guess. It is an easy class to begin with, hard to screw up geometry. Probably the most bland and boring person I have ever met in my entire life. He is honestly very nice and friendly, but he cannot teach/keep students engaged to save his life. It's better to ditch half the time and study at home. Save yourself the hour of boredom.

5.0
2.0
GEOM083
Dec 19, 2010

Wonderful teacher, cares about his students, funny, silly, a brilliant mind. As long as you do the homework and attend class, you will well. He helps you understand what you don't know. He goes above and beyond a regular professor. I would recommend him for any level math class you need.

1.0
5.0
GEOMEMATH
Dec 8, 2011

Instructor very blunt and not encouraging at all.No extra credit, no study guide just "study the chapter". I do not recomend this class with this instructor unless you have a private tutor.

2.0
4.0
MATH83
Dec 20, 2011

I absolutely loved math prior to this class. I took Geometry in high school and aced it easy. His voice is very monotone and he talks about random boring nonsense that doesn't interest me or anyone else for that matter. His tests are short and blunt which is good but his explanations suck.

1.0
5.0
GEO083
Jan 11, 2012

very much in his own world. all the test had something we did not cover. was very unclear when he explained things.

5.0
2.0
MATH070
May 31, 2012

Great teacher, really wants everyone to pass. Lets you drop your lowest scoring test and curves all the others. I would and already have recommended him to other people. He really "dumbed" it down to explain it, which is exactly what my class and I needed. 1/2 the class only showed up for tests.

5.0
3.0
MATH070
Jun 8, 2012

This instructor explains things in a way that is understandable. I think the students that may have a problem with him are ones that don't show up. He genuinely cares about the success of his students. If you show up and do the work, you will do well. If you think you can just show up for tests, blame yourself and not him for your failure.

3.0
1.0
MATH140
Jan 5, 2013

He's ok for stats. He let us use all of the formulas on tests. Highest grade gets 100% on the test and curve the rest accordingly. I spent 3-4 hrs a day in the lab, so make friends with stat tutors. Didnt buy the book, still got a B. Ask him about his conspiracy theories, lol

1.0
5.0
MATH140
Apr 23, 2013

Probably the worst teacher I have ever had. I came into this class wanting to learn and pass. He does not explain things well at all. He likes to talk about stars and things that do not relate to this stats class. You basically have to teach yourself everything. I definatly would not reccomened him to anybody. Worst teacher I have ever had.

2.0
4.0
STATS140
Jul 3, 2013

I dreaded going to class everyday knowing I wouldnt learn anything new. I basically learned from the study guides he gave us with answer keys because it is similar to his test. I wish I picked a different professor for this subject.

1.0
5.0
MATH140
Jul 8, 2013

I have always been good at mth and struggled everyday with this class. BE PREPARED ... to teach yourself, spend lot of time in tutor lab, and 3hrs on homework every night. WORST CLASS IVE TAKEN.. He is a nice guy though =/

3.0
2.0
MATH140
Aug 8, 2013

Erickson is nice, but gets distracted very easily and goes off on tangents. Do your homework and visit the TLC. It helps! There were times you had to get help from others because the way he taught things was not very clear. If you want to LEARN stats, then I would take another professor. Otherwise, Erickson is passable. Tests are straightforward.

5.0
2.0
MATH140
Nov 20, 2013

Erickson is a very good professor. Just like every class you take in college, your grade will reflect the time and effort you put in. The students that were there everyday did well. Don't take him if you are just looking for an easy class. Erickson's teaching style prepares you for a 4 yr school. Work hard and don't make excuses & you'll be fine

2.0
2.0
MATH104
Dec 3, 2013

Erickson is a very genuine professor. He LOVES math--especially any type of math related to aerospace engineering or anything of that sort. That being said, he WILL go off topic pretty much EVERY class. You must visit TLC lab and learn to work your hw out thoroughly (tests are based on hw). He's an awesome grader and will give partial credit.

2.0
4.0
104
Jan 4, 2014

He gets off topic way too much. Does no explain material well at all. Hard to get in contact with. When he gives a study guide his exams can be easily passed. However, his rants on other topics took time away from the class. The whole semester we were behind forcing him to rush through material.I DO NOT RECOMMEND! He needs to work on managing time

4.0
3.0
MTH104
Mar 25, 2014

Good teacher overall. His note-taking methods and lectures are fairly organized and clear;I found them useful and applied them to other classes(I am a stem major) . Although he may go off topic and digress into stories about his life and career, the stories he tell are of great value and relevance, teaching us about STEM-related topics and careers.

3.0
1.0
MTH104
Jun 25, 2014

It was an easy class overall (do the study guides)but lecture was often confusing. He would often go on long tirade about space or his life and was obsessed with conspiracy theories. Still, he was great.

2.0
3.0
MATH104
Jul 4, 2014

He's a good guy but extremely disorganized. Frequently wasted 50%-75% of lecture off topic and tries to squeeze in some frantic instruction at the end. Mandatory note taking so if you're a tactile/auditory learner you'll hate it. I liked him personally but he seems amateur as a professor. Tests aren't too hard, but he takes a while to grade them.

2.0
4.0
MATH240
Jun 10, 2015

Terrible professor, frequently goes off topic and talks about his personal life. He is not good at explaining tougher topics and gives pointless projects that do not help with the understanding of any of the topics presented in the class. Avoid, if possible

1.0
5.0
MATH240
Jun 23, 2015

Simply, the worst. Blames his students for his own mess ups; disorganized; assigns essays and power-points; lectures are a complete waste of time and all material is straight from the book; hw is a random 50 questions out of the book, with many involving material not covered yet. On top of all that, check out his conspiracy website "mymathmantra".

2.0
5.0
MATH102
Nov 21, 2015

Doesn't give study guides/do any test review, doesn't allow time for homework questions, frequently refers students to the TLC instead of helping, wastes 30 min. talking about irrelevant things, then rushes the whole section in the last part of class, highly disorganized, though the notebook must meet his organization standards. Do not recommend.

5.0
1.0
MATH102
Grade: A+
Dec 5, 2015

I have had 5 other math classes at COC, Prof Erickson is by far the best. You get points by simply doing the homework, notebook, and classwork (Basically a Free 15%). He is one of the only Prof's at COC who lets you use a Calculator, as well as a notecard on some tests. He was also upfront at the beginning of his EXACT expectations for your work

3.0
3.0
MATH104
Grade: A
Dec 15, 2015

Lectures are easy to understand. No hand out study guides for six tests (5 mid-semester, 1 final). Tests are straight forward but make sure you know your math. 1 or 2 questions every test are tough. Easy B if you pay attention. Relatively easy A if you actually do your homework. Overall, good teacher.

4.0
3.0
MATH104
Grade: C
Dec 16, 2015

Erickson is a very nice guy and is there for you if you ask for help. This said, you will need to ask for help. Lectures can be a bit disorganized from my experience and if you don't ask questions you will fall behind and it will hurt you. Test are not too bad at all but Im still unsure of where the questions come from; this makes it hard to study.

3.0
3.0
MATH104
Dec 16, 2015

Erickson really likes to go off on tangents about spaceships and their parts. It was interesting for the first few minutes, but when it begins to go on for 30 minutes it's annoying. Doing all of the homework and class work can save your grade, so you need to show up.

3.0
3.0
MATH102
Grade: B
Dec 18, 2015

Cool guy with interesting stories. However, often times he would waste time and rush the lecture being more unclear than usual. I believe I had an advantage since I had taken precalculus in high school, so I had seen most of the material. If it were my first time seeing this material I would have been so lost. He does allow calculators!

1.0
4.0
MATH240
Feb 28, 2016

Has very specific standards for homework, but is himself disorganized. For some reason hates line paper. He doesn't really understand how to project his voice for long, he begins to mumble and its easy to get lost. Overall, I'm taking this class cause I have to, and have no choice but to go to the tlc as they might be of use. Do not take this guy.

2.0
4.0
MATH103
Grade: C
Apr 10, 2016

His lecture is long. He has really interesting stories but often times the story is too long. Some of the homework he can't even explain them... I am in his Physics 101 class at LACC. He is a little bit hard in grading, but he can understand students and there for some help.

5.0
2.0
MATH240
Jun 7, 2016
Would take again

Excellent at relating coursework to business applications and encourages all of his students to succeed. Homework is reasonable, and exams are challenging yet well-spaced throughout the semester. You can earn a good grade by completing all your work and doing the recommended study for exams. Always answers student questions. Take his class!

5.0
3.0
MATH102
Grade: A
Jun 8, 2016
Would take again

Since most of the stuff here is vague I'll specify: .Homework everyday but does count for credit .lectures are heavy but he makes it interesting and fun .Drops the two lowest test grades so PERFECT .Test are simple if you understand the chapters .Test are chapter by chapter so it's literally one chapter at a time .Notebook notes counts as grade

2.0
5.0
MATH240
Grade: C-
Jun 10, 2016
Wouldn't take again

Mr. E is always changing the descriptions for his assignments. No study guides are handed out for tests. He digresses too much during lectures. He is not good at teaching the material and tutors had to teach me most of the material.

4.0
3.0
MATH214
Grade: A
Jun 6, 2017
Would take again

Mr. Erickson is a solid teacher. He does sometimes go on tangents but they're usually about how the material can be used in the real world, which is cool. His tests are short and ok if you do the homework and understand the concepts. Lectures were theorem heavy but maybe that's just the nature of the class... Good teacher overall.

2.0
3.0
MATH214
Grade: A
Jun 7, 2017
Wouldn't take again

Mr. Erickson is alright, his tests are fair and he drops one, plus grades homework for completion. My complaint is that he goes off on too many tangents, didn't seem to have lectures organized, and he fell behind so the class felt rushed at the end. Be prepared to teach yourself a lot of the material.

Caring
5.0
4.0
MATH214
Jan 8, 2018
Would take again

Professor Erickson is extremely knowledgeable about the engineering fields. Tests are difficult, but graded fairly. Test questions are from the book or homework. He tends to run the class behind schedule. The homework load can be brutal. His tangents are entertaining and informative. Take his class if you actually care about learning the material.

LOTS OF HOMEWORK
Tests are tough
Would take again
1.0
1.0
MATH214
Grade: C
Jun 4, 2018
Wouldn't take again

I took him for linear algebra and I learned nothing from. I attended all classes but one. His lectures are very unorganized and his grading is not clear. He takes points off of questions without giving adequate explanations. He goes off on tangents all the time sometimes longer than 30 minutes. I ended up teaching myself from the book and youtube.

Tough Grader
TEST HEAVY
1.0
4.0
MATH214
Grade: C+
Jun 4, 2018
Wouldn't take again

DO NOT TAKE HIM. HE DOES NOT TEACH AND HE ALWAYS GOES OFF ON TANGENTS.

Tough Grader
LOTS OF HOMEWORK
TEST HEAVY
2.0
5.0
MATH212
Jul 18, 2018
Wouldn't take again

His lectures were pretty useless as he just goes off his pre-written notes and doesnt work out examples all the way. Tons of HW, he cant do last few hw problems himself. Many ppl dropped/ failed class eventually. He ended up putting in a ridiculous amount of extra credit to make grade averages normal. Grades things quickly, but AVOID IF YOU CAN.

EXTRA CREDIT
LOTS OF HOMEWORK
Get ready to read
1.0
1.0
MATH240
Grade: Not sure yet
Sep 29, 2018
Wouldn't take again

He is rude and condescending at times. Do not take this professor if you want to learn.

LOTS OF HOMEWORK
LECTURE HEAVY
3.0
4.0
MATH102
Grade: A
Nov 27, 2018
Wouldn't take again

Not a bad teacher, but he's quiet and has messy writing. Sit close to the board if you want to be able to hear the lectures. Homework is graded for completion, so it's a good way to boost grades. His tests are difficult, but he drops the two lowest tests. All tests and finals are weighted a lot, so study. Warning: he goes on tangents all the time.

Skip class? You won't pass.
TEST HEAVY
LECTURE HEAVY
2.0
5.0
MATH214
Grade: B
Dec 27, 2018
Wouldn't take again

Took this professor for Linear Algebra. This was the first time I had a hard time on a math class. Professor Erickson, as a person, is very nice, but when it comes to teaching, no. He goes off tangent every time and the lectures are long. The final exam was really weird; it was like a story. Self-taught myself throughout the semester.

Skip class? You won't pass.
LOTS OF HOMEWORK
LECTURE HEAVY
1.0
5.0
MATH214
Grade: Drop/Withdrawal
Jan 8, 2019
Wouldn't take again

This guy should have been aborted. He does not know how to teach. He goes off on tangents and the final is really confusing. DO NOT TAKE.

1.0
5.0
MATH102
Grade: C-
Jan 22, 2019
Wouldn't take again

Pretty bad. He does not convey the information very well. He goes off of old notes and gets confused . He also does not stress the important parts and it's easy to get lost in the lecture and miss an important part. I basically had to teach myself everything. A lot of homework. The only good thing about this guy is that he curves all of his tests.

LOTS OF HOMEWORK
SO MANY PAPERS
LECTURE HEAVY
1.0
3.0
MATH214
Grade: B
Feb 5, 2019
Wouldn't take again

He is by far the worst math professor I have taken. He goes off tangents a lot in class, I would not recommend taking him at all. Take any other math professor if you want to pass the class and Actually Learn something.

Tough Grader
Skip class? You won't pass.
5.0
3.0
MATH214
Grade: A
Aug 7, 2019
Would take again

Great teacher. Although Erickson might be deemed as tough by some students standards, his current low score shouldnt scare you. He is extremely well versed in his subjects and is straightforward. Fair grader, great lectures, real world applications. Take his class. Apply yourself. Pick his brain. You wont regret it. Would take again hands down

Participation matters
Inspirational
Amazing lectures
1.0
5.0
MATH140
Dec 3, 2019
Wouldn't take again

I would definitely not recommend taking this class unless you are familiar with stats or know how to teach yourself!!!

Lots of homework
So many papers
Lecture heavy
3.0
4.0
MATH212
Grade: A+
Dec 7, 2019
Would take again

He can wander off-topic sometimes, but he seems to be aware of this habit and will get back to the topic if you just ask a question related to the lecture. Be prepared to study the book, however, especially for a heavy course; there's little time in-class to actually do the stuff, especially deeper into the semester.

Get ready to read
Skip class? You won't pass.
Clear grading criteria
2.0
4.0
MATH140STATS
Grade: B
Dec 9, 2019
Wouldn't take again

Doesn't ever go over anything and loves to lecture off topic on stories that make no sense to what's going on inside the classroom. Difficult class with lots of homework but could be easy if you learn on your own well or have taken the class before

Lots of homework
Get ready to read
Participation matters
3.0
5.0
MATH140
Grade: A
Jan 4, 2020
Wouldn't take again

Prof. Erickson is humorous and laid back. He'd lecture in his socks. Class was difficult considering there was a lot of homework and it was graded heavy (few homework assignments were 100+ points). He uses Matt Teachout's online textbook. No need to take notes, everything is in the online book. He lets you turn in late work, but it'll add up.

Lots of homework
1.0
4.0
STATS140
Grade: A+
Jan 16, 2020
Wouldn't take again

took erickson for fall at valencia. WOULD NOT RECCOMEND. It was basically an online class you had to show up for. His lectures are messya and confusing & always goes off topic. Thankfully i remembered some stuff from high school, but if youre 100% new to stats, be prepared to attend tutoring/teach yourself the material. Youtube was my sensei

Lots of homework
Skip class? You won't pass.
5.0
4.0
MATH212
Grade: A-
Jan 27, 2020
Would take again

Professor Erickson understands and is well versed in STEM subjects. He gives very well articulated and in-depth lectures on all topics of calculus. He covers material in an easy to understand manner.

Skip class? You won't pass.
Lecture heavy
4.0
4.0
MATH140STATS
Grade: A
Jan 30, 2020
Would take again

Im not a STEM major and I have a general dislike of the subject matter, but this class was standard/good. It's important to listen during lectures (even tangential ones) and to put A LOT OF TIME into studying or you WILL NOT get an A. As a professor he will put time in to explain things if you're confused and he is actually a really great guy.

Lots of homework
Skip class? You won't pass.
Group projects
4.0
4.0
MATH140STATS
Grade: A+
Jan 30, 2020
Wouldn't take again

He's a very nice professor, if you do what's asked and do your best to be ahead of the homework it's easy. Learning the material on your own is crucial, and if needed tutoring as well. I recommend if you're independent!

Lots of homework
Get ready to read
Graded by few things
5.0
3.0
MATH227
Grade: A+
Feb 6, 2020
Would take again

An overall great teacher, I took him for my last attempt at statistics and due to the amount of work and effort you have to put it really pays off. He goes by the book and teachers you everything step by step so the work becomes a breeze. He is an over all amazing teacher and a really cool guy. I would take again if I could

Gives good feedback
Inspirational
Caring
5.0
4.0
MATH140
Grade: B
Feb 20, 2020
Would take again

I struggled with stats but it wasnt because of Mr. Erickson. Stats is just a difficult subject matter for an English major. I thought he was caring and I enjoyed taking his class. Im done with all my math prerequisites but if I wasnt, and needed another math class, I would take it from him.

Gives good feedback
Clear grading criteria
Caring
5.0
3.0
MATH070
Grade: B
Aug 18, 2020
Would take again

Great class overall! Reason I said if you skip class you won't pass was well, because it's a math class. The professor would take time to answer your questions as clearly as possible and would even stay after class for students to help any who where still confused with the material. He was also very accommodating to me when called for riots.

Gives good feedback
Accessible outside class
Caring
1.0
4.0
MATH140
Sep 11, 2020
Wouldn't take again

He just drones on and on and on about things that are completely unrelated to the class.... He does a poor job of defining terms and explaining the course material, and provides absolutely no preparation for the weekly quizzes. We don't even go over half of the problems on the quizzes and he literally gives us 5 minutes to complete the entire quiz

Skip class? You won't pass.
Graded by few things
Lecture heavy
1.0
4.0
MATH140STATS
Grade: A
Sep 16, 2020
Wouldn't take again

Quizzes and tests are brutal, as is the homework load. He knows statistics well, and can teach, but seems ill-prepared for quizzes and tests, and out of 30 questions on our first quiz, 9 were of material we had covered. From a student perspective, it is challenging to manage, especially with remote classes because of COVID.

Lots of homework
Skip class? You won't pass.
1.0
3.0
MATH140
Grade: Not sure yet
Oct 6, 2020
Wouldn't take again

Uses teachouts website, doesnt know the material well, also doesnt respond to emails considering this is an online course. He creates the test during class break. Always unprepared for class, goes off on tangets about his kids. Terrible writing, BORING BORING lectures. Test are extremely long not enough time. Don't take his classes. Nice guy tho :/

Lots of homework
Skip class? You won't pass.
Test heavy
1.0
4.0
MATH215
Grade: Not sure yet
Oct 21, 2020
Wouldn't take again

One of the worst math teachers I've ever had. For comparison, I've gotten A's in all of calculus and linear algebra. I am trending towards a low B in this class because his lectures do not match homework which do not match tests. He is extremely off topic, never responds to emails, and gives no test prep whatsoever. Do not take. Would rate 0.

Graded by few things
Test heavy
1.0
5.0
MATH215
Grade: Drop/Withdrawal
Nov 3, 2020
Wouldn't take again

Another wise guy who never learned how to teach. Mightve been good in his past profession, but he certainly is not even a decent teacher. He lectures as if we already knew everything, and could barely understand him. Forgets about office hours, never responds to emails, and is not considerate to those who work long hour shifts. Beware of this guy

Lots of homework
Lecture heavy
Tough grader
1.0
2.0
MATH140
Grade: A
Dec 8, 2020
Wouldn't take again

He's a good guy, but if this is your first math class, I highly recommend that you avoid this professor. The textbook doesn't match the test, but some of the questions do, maybe they don't-- maybe you weren't even taught that. Do you need to email a question? Won't answer. Miss a class or two? You risk being dropped. Need grades? Good luck.

Lots of homework
Group projects
1.0
5.0
MATH215
Grade: B-
Dec 21, 2020
Wouldn't take again

WORST PROFESSOR EVER!! I have gotten A's in ALL my past math courses DE is really not that difficult of a subject, but good luck learning anything with Erickson. Laziest prof. ever, doesn't know the first thing about teaching, completely unorganized, lectures are pointless you'll do better if you don't even watch them, AVOID TAKING!! AVOID, AVOID!!

3.0
4.0
MATH140STATS
Grade: A
Jan 16, 2021
Wouldn't take again

Professor Erickson can be lenient at times but i would recommend taking another professor. He's very fast paced and doesn't go over the material very well. if you dont know the material beforehand it will be very confusing. exams and quizzes are proctored through zoom, lots of hw doesn't respond to emails. You will definitely have to work for an A.

Lots of homework
Skip class? You won't pass.
Lecture heavy
5.0
3.0
MATH140STATS
Grade: A-
May 21, 2021
Would take again

Roy taught well in a challenging year. You do need to attend class, do the homework. If you ask for help, he will make sure you understand! Showing up just for tests will lead to getting friends to post nearly identical negative reviews. Doesn't sound like they were in the same class I was, but I guess you get out of it what you put into it.

Gives good feedback
Accessible outside class
Caring
5.0
4.0
MATH215
Grade: B+
May 21, 2021
Would take again

I've always been intimidated to take this class, knowing it would be a rough topic. I found that by completing all the assignments, and getting Mr. Erickson's excellent one-on-one assistance during office hours, I could understand this rigorous topic. All said I'm pleased w/ my grade & couldn't have comprehended it without Mr. Erickson's help.

Accessible outside class
Clear grading criteria
Lots of homework
5.0
4.0
MATH070
Grade: C+
Aug 14, 2021
Would take again

Great Professor and very solid lectures. Personally, don't have an interest in math but he made the course much easier and fun to understand. Make sure you leave time to do homework assignments for this class, study for tests and you won't have a problem learning the lessons.

5.0
4.0
MATH070
Grade: B
Aug 17, 2021
Would take again

Professor Erickson is an excellent choice, though it is ill advised to perceive such a comment as "An easy A." While I am not partial to mathematics myself, if one would want to learn how it actually works he's your guy. However, Professor Erickson expects you to work for your grade and respect his class. Very caring too, and is willing to help.

Lots of homework
Test heavy
Lecture heavy
1.0
5.0
MATH212
Grade: C
Mar 15, 2022

He’s the worst! He’s so unorganized and gave us homework that he didn’t even teach in the lectures. Absolutely one of the worst professors ever. Avoid at all costs.

Tough grader
Lots of homework
4.0
3.0
MATH215
Grade: A
Aug 8, 2022
Would take again

This professor gave good lectures explaining how to solve the homework to do later that night. He stayed after class if someone needed a clarification on a topic, and his homework was usually just as difficult, if not harder than the tests, so it prepared you well. He's a tad slow when responding to emails, but homework was due the following week.

Caring
Lecture heavy
5.0
3.0
MATH215
Grade: A
Aug 18, 2022
Would take again

Prof Erickson cares deeply for his students and is willing to spend time talking after class if necessary. I found his grading to be very fair and he normally informs you on which questions/concepts to focus on in order to succeed on tests. As long as you attend lectures and are willing to spend time on the homework, the class is very much doable.

Participation matters
Lecture heavy
Test heavy
5.0
3.0
MATH212
Grade: A-
Oct 5, 2022
Would take again

Professor Erickson offers a teaching style especially made for STEM oriented students like me, STEM students are lucky to have him, and he's a credit to the College of the Canyons,

5.0
3.0
MATH212
Grade: A-
Oct 5, 2022
Would take again

Mr Erickson is a good professor. I enjoyed his lectures, and helped me understand things that I normally struggle with ordinary differentials equations. People who put in the work, got the grades that they were looking for, and bonus, they actually learned the material!

Participation matters
Caring
5.0
3.0
MATH212
Grade: A
Oct 5, 2022
Would take again

Want to learn and actually understand the material? Then I say Mr Erickson is your professor, because he really cares that his students can learn. Make sure to put in the work, and then he's the best!

Gives good feedback
Caring
Accessible outside class
4.0
3.0
MATH104
Grade: A
Oct 7, 2022
Would take again

Professor Erickson is a very easy grader when it comes to tests. He does require homework and a notebook that is all graded, but these help you stay on track during the class and not fall behind. Homework is graded by completion. If you do all of your homework for this class and have a strong background in Algebra you should be able to get an A.

EXTRA CREDIT
Lots of homework
Lecture heavy
5.0
4.0
MATH212
Grade: A-
Oct 7, 2022
Would take again

Some of the chapters seemed fast paced, but if you kept up you could at least get a B in the class. To get an A you some times needed to avail Professor Erickson of his office hours, as, especially one on one, he is a very excellent instructor who knows course topics extremely well.

Tough grader
Gives good feedback
Respected
5.0
3.0
MATH212
Grade: A+
Jan 14, 2023
Would take again

I took Mr. Erikson for both pre calc and calc 2 and he cares about helping his students and makes the difficult experience of Calc 2 a little easier. Although his lectures can be slightly hard to grasp because of the hard material, he is a very easy test grader and bumps up test grades based on the averages. He truly wants his students to succeed.

Clear grading criteria
Caring
Test heavy
4.0
2.0
MATH214
Grade: A
Dec 10, 2023
Would take again

Honestly not that bad of a professor as the low ratings might insinuate. He's a bit monotone in his lectures, and goes off on a lot of tangents regarding the course material, but his website includes all previous notes and sample exams. There is absolutely no reason for you NOT to get a B or an A in his class if you actually put in a bit of effort

Accessible outside class
5.0
3.0
MATH083
Grade: B
Feb 20, 2024
Would take again

I just wanted to say this guy was my Geometry teacher a while ago. But I enjoyed his teaching style and he was a great teacher. You show up you do your homework, and get tutoring if you need and he will pass you.

Amazing lectures
Clear grading criteria
Gives good feedback
2.0
4.0
MATH140
Grade: A-
May 29, 2024

This professor is equipped with a very confusing style of teaching where he doesn't cover anything in the chapter but assigns homework, projects, tests, and a final that require you to go back after class and dig through the random mix of textbooks used to learn the way he wants it done. Half the time i had no clue what is due if anything.

Lots of homework
So many papers
2.0
5.0
MATH140
Grade: Not sure yet
May 30, 2024

If there is anyone else teaching statistics take them. His two-hour lecture consists of him ranting about his personal life. He assigns a massive amount of homework. He is not understanding and when you ask for help he says he'll get to it and never does. He does everything but teaches the actual class. His tests are hard and he grades unfairly.

Tough grader
Lots of homework
Test heavy
3.0
2.0
MATH213
Grade: A
Jun 5, 2024

Most Calc 3 learning was spent on YouTube instead of lectures by Erickson. He has a fun personality but a monotonous voice as he often goes off on tangents and is disorganized. His tests are fairly easy as he provides good study guides. Just do your homework and prepare well for exams.

Clear grading criteria
Caring
3.0
3.0
MATH213
Grade: A+
Jun 16, 2024

this professor 100% has ADHD in some capacity. that being said, his website heavily makes up for his lack of organization and his tangents during class. if you're lacking organization yourself, I would stay away. (watch professor leonard or go to paul's online math notes if you need to self study)

Lots of homework
Lecture heavy
Online Savvy
1.0
3.0
MATH213
Grade: A+
Jun 17, 2024

I felt that Professor Erickson never explained any of the conceptual aspects of the math and I gained 0 insight on any important concepts. He was disorganized, goes on random tangents, and does not teach well. As a side note he is always willing to help students and his exams are fair. Expect to spend hours on Youtube and learn about his life

5.0
3.0
MATH214
Grade: A
Jul 29, 2024
Would take again

He gave clear lectures and was available for questions afterward, and he scans the paper notes so you can refer back to them later. I really appreciated him handwriting his lecture notes in real-time, so I could keep up writing my own notes instead of having lecture slides that disappear after 2 seconds. He was fair when it came to curving tests!

Amazing lectures
Clear grading criteria
5.0
3.0
MATH140
Grade: A
Jul 29, 2024
Would take again

His class was not that hard for a math class. The notes we take during lecture are very helpful for the homework and the tests. The study guides are the best part as they help a lot with the outcome of your exams. The only downside to his class is his random talks he makes during lecture. Overall not bad.

Lots of homework
Caring
Accessible outside class
3.0
4.0
MATH212
Grade: A+
Aug 2, 2024

My issues with the class mainly lie on Prof. Erickson intentionally making his tests harder than the tests he made for the same class he taught years prior. They were doable, but for an accelerated class, it was rather deceptive. He was also quite disorganized and would go on long tangents during instruction. His website is nice though. (math 211)

So many papers
Test heavy
Online Savvy
5.0
3.0
MATH140
Grade: A
Aug 4, 2024
Would take again

Very fair grader. Interactive. Makes learning fun and he expects you to work hard; this will earn you an endless amount of benefits in life. Speaking of life, he goes on tangents sometimes but they always contain good lessons about the world. Professor Erickson is a great math teacher and an amazing life teacher. His lessons will stick with you.

Inspirational
Caring
Respected
4.0
2.0
MATH140
Grade: B+
Aug 5, 2024
Would take again

He was super chill and the class wasn't so hard. Lots of note taking so its super easy to study for tests.

Clear grading criteria
Hilarious
Lecture heavy
2.0
3.0
MATH140STATS
Grade: A
Aug 18, 2024

I spent the majority of my time seeking help from math tutors on campus or online. When I sought help I wasted time because the tutors didn't know how this professor thought the course. This class is very notes heavy. There is very little to no practice in class, so I taught myself at home. However, I did feel as if he was fair with test scores.

Group projects
Lots of homework
Lecture heavy
3.0
2.0
MATH140
Grade: Not sure yet
Oct 16, 2024

He was a good teacher, but he would go on random tangents about his daughter at Berkley. Lectures were boring, but they were not difficult at all. I used most the time in class to study/prep for my other classes. Overall, its an easy class with easy exams. Homework is due every Monday at the end of class. (I did it during lectures on the due date)

Lots of homework
Lecture heavy
1.0
5.0
MATH140
Grade: Incomplete
Dec 4, 2024

Stop yapping about your daughter and family, no one cares about you hopeless you professor, stick to teaching stats, if your daughter is smart, why do you teach at a community college, if you hate life I suggest moving to Europe you fit better there

Hilarious
Lecture heavy
1.0
3.0
MATH140
Grade: A-
Dec 4, 2024

I think I learned more about his daughter and marital problems than the actual math. He actually would just not stop yapping. I learned more from a 5 min youtube tutorial than several of his classes. Absolutely not helpful, stick to teaching preschoolers please.

Hilarious
Lecture heavy
1.0
4.0
MATH140
Grade: F
Dec 4, 2024
Would take again

i got an f because i was too busy gooning to his toes while he walked around barefoot.

Lots of homework
Lecture heavy
Test heavy
2.0
4.0
MATH140STATS
Grade: A
Dec 5, 2024

Rambles on and on. Don't bother with his lecture notes. Just use the free textbook he gives, teach it to urself. His tests are nonsensical. The homework is so straightforward, but his tests are just pages of riddles. I don't care at all ur daughter goes to Berkeley or that she doesn't know how to use a washing machine. PUT YOUR FEET AWAY PLEASE!!

Get ready to read
Lots of homework
Lecture heavy
1.0
4.0
MATH213
Grade: C
Dec 13, 2024

Is a conspiracy theorist and lectures would often devolve into his conspiracies, family, and past work projects. Just teach the math, my guy. No one cares about your aliens and UFOs.

2.0
3.0
MATH140STATS
Grade: A+
Dec 16, 2024

Lectures, while informative, were hard to read/hear due to low & monotone voice & handwriting. Often got sidetracked & went on tangents unrelated to class. Projects were given within 2 weeks of end of semester. About half the class still present near the end of semester. But his website was very helpful for formulas: mymathmantracom/Math.

Lots of homework
Test heavy
Graded by few things
3.0
2.0
MATH213
Grade: A
Feb 8, 2025
Would take again

Professor Erickson has a fun personality, but can be disorganized in lectures. I found YouTube and Unstuckstudy helpful for self-studying concepts. Attend classes, do homework, and prepare well for exams.

2.0
3.0
MATH140STATS
Grade: B+
Mar 23, 2025

Being in this class is like taking an online class, but you are attending in person. He gets sidetracked, even while asking him questions in person. He doesn't reply to emails either. Just be prepared to read the lessons on your own time because he goes over whatever is in the math book. He gives out a lot of homework. Exams are pretty fair.

Get ready to read
Group projects
Lots of homework
3.0
3.0
MATH140
Grade: A
Apr 8, 2025
Would take again

Lights are on but no one's home. Nice guy tho

Lots of homework
1.0
5.0
MATH140STATS
Grade: Rather not say
May 22, 2025

Talk's like a toddler, very un-organized, rambles all class when asked for help he refers you to your partner who is also confused. needs a new job.

Tough grader
Lots of homework
Lecture heavy
1.0
5.0
MATH140
Grade: B
May 22, 2025

Cant talk properly and cant read his writing and get mad when we write bad on the homework. Needs to go on feetfinder because his toes are out and curling them in the back

Tough grader
Lots of homework
Test heavy
1.0
4.0
MATH140
Grade: Not sure yet
May 22, 2025

Useless, overcomplicates the content for no reason, must be 80% deaf. Most of the time ignore your question, otherwise he tells you to ask a classmate, best case scenario, answers your question, halfway through the answer he walks away. Takes his shoes off in class, luckily his feet don't smell. Gives loads of homework. Goes off topic 24/7

Group projects
Lots of homework
4.0
4.0
MATH212
Grade: A+
Jun 5, 2025
Would take again

The other reviews show Professor Erickson in such a bad light, but to be honest, he's not that bad. Even though he went off on tangents sometimes, I used this time to start on the homework. To me, his tests seemed pretty easy and were clear. If you have the chance, take Professor Erickson!

Lots of homework
Lecture heavy
Test heavy
1.0
4.0
MATH140
Grade: B
Jun 17, 2025

RUN. Take any other math class except this one. I could have gotten a good grade in this class if he weren't such a bad teacher. Straight up rude and confusing. Lied to students about how many exams were left and did not care. When asked a question, he wouldn't even answer half the time. The entire class was confused. Do yourself a favor and don't

Tough grader
Lots of homework
5.0
4.0
MATH212
Grade: B+
Aug 20, 2025
Would take again

Great professor, would like to take Calculus 2 with him

4.0
4.0
MATH212
Grade: A
Aug 20, 2025
Would take again

Bad rep but it actually very caring and KIND! Grades VERY leniently. Though his lectures weren't too helpful for me personally, learning outside of class is EXPECTED in these types of classes. Is passionate about student success...goes in and updates his notes on his website if there are mistakes etc. Much better than other math profs at COC!

Get ready to read
Lots of homework
Online Savvy
1.0
5.0
MATH212
Dec 17, 2025

(Couldn't select Math211 but that's that I took with him). From student to student, do not take this professor. He was extremely inconsistent on telling us what homework was due and when. He fell behind on lesson plans and would condense parts of units into one test. When students did bad on tests- blamed bad scores on politicians.. ?? (not joking)

Lots of homework
Lecture heavy
Test heavy
Class Info

Online Classes

100%

Attendance Mandatory

73%

Textbook Required

0%

Grade Predictor

Your expected effort level

LowHigh

Predicted Grade

B+

95% confidence
Based on 68 grades
Most common grades:
A (25)
A+ (11)
B (10)
Grade Distribution
A(36)B(11)C(9)D(2)F(1)A-/B+(11)
Based on 78 reported grades
A: 25
A+: 11
B: 10
A-: 7
Common Tags
Lots of homework (33)
Lecture heavy (20)
Caring (12)
Test heavy (12)
Skip class? You won't pass. (11)
Clear grading criteria (8)
Get ready to read (7)
Gives good feedback (7)
Rating Trend

Declining

-0.24 avg change
Mar
Apr
May
Jun
Aug
Dec
Last 6 months
Ratings by Course

MATH130

5.0

(1)

GEOM083

5.0

(1)

MATH070

5.0

(5)

MATH227

5.0

(1)

MATHV21B

4.0

(1)
+19 more courses
Difficulty by Course

ALG070

5.0

GEOMEMATH

5.0

GEO083

5.0

104

4.0

MATH83

4.0

Similar Professors