Teaches Well, I recommended if you havent taken calculus in high school. Explains things well. Its a challenging course but everythin works.

First Impression: Seems inexperienced since he made numerous mistakes and gets confused sometimes. After thoughts: He knows his stuff, explains concepts fairly well. He attempts to bring life into the class by using some what cheesy demonstrations, funny!

Knows his subject well but book teaches better, which he teaches directly from. MT and Final are easy if you do the practice tests, but you have to hurry. Funny demonstrations, but generally teaches to the board.

A hard subject, but professor is clear and easy to follow. Exams are straight forward; no tricks, but do the sample exam. Discussions are essential if you dont understand.

Professor Hass is a funny man, a bit on the dorkish side. This however, does not detract at all from the way he teaches. His explanations are very helpful. He only needs to work on printing clearer tests. Sometimes f'(x) looks like f(x).

Seemed a little fast for people w/o prior experience, but maybe tht's just how it is. Good lecturer, who is funny at times too -- a definite plus. Tests are very reasonable; similar to practice, but little partial credit. Fairly easy w/ prior experienc

Nice guy. Teaching level is above average and is quite helpful.

great teacher although lectures were a little on the dry side, the examples he did were helpful. midterm and final were somewhat easy. on first day, he seemed very unprepared and not very articulate at all. but after a while, he got his things together.

good prof, class is curved, (tests may be hard, but then everyone screws up & gets curved anyway)

Great teacher with sense of humor. A few nerds make you laugh in this class, too. Structure of class is unforgiving: no e.c., very little partial credit on midterm, must go to all discussions to turn in homework. However, you'll hav fun in here.

The only reason why i went to class was to catch a good laugh. It's perfect for those with prior calc experience, if you give it the effort, it's definitely not a bad class at all.

With prior calc experience this was a very easy class. I enjoyed the class a lot. Hass made the class interesting with demonstrations and with his humor. If you have taken calc before, I would definitely reccommend his class.

Lectures are useful, he's funny sometimes. His midterm and final are easy. much easier than the other professor. try to get dis guy!

class is challenging if you took calc ab instead of calc bc. teacher is relatively clear in his teaching style. his tests are very fair and similar to practice ones. u will learn a lot =)

I took CalcBC in HS so this class was soo easy. He tries to make his lectures interesting by bringing in props for demonstrations. However, I kept falling asleep in that class. It's not his fault though. He's not that bad.

Makes things very clear and you can actually make it through the class b/c he does examples and funny things.

Teacher is interseting and funny. Makes things clear. A good Class

He is softspoken and because of his slight monotone and softspoken nature some people fall asleep. But I find him totally interesting. He also keeps the class interesting through funny demonstrations and stuff. Straightforward tests, just do the work and this class should be an awesome experience.

he is a good teacher. sometimes homework is harder than problems in lecture. but very straightforward tests. u know whats going to be on the test, because he tells you. makes an effort to make the class interesting. would definately recommend him

Joel Hass is a great teacher. He has funny demonstrations in class and explains things with many examples. He helps by putting sample exams online that are very similar to the midterm and final. The breakdown: 15% hw, 30% midterm, 55% final. He has lots of ta's with office hours too.

This guy is the man!

Tries to make classes funny by sliding a few jokes, sometimes works. Lectures are okay, but sometimes he can get disorganized while writing on the board. Exams are easy, just study lecture notes (considering you take good notes) and you'll be fine :)

as good as it gets

Great Prof

Joel is the man! I think he owns two sweaters and alternated every other day, but other than that he is a great teacher. Very knowledgable. The homework is harder than the tests. The practice exams prepare you well for the actual tests. His accent is cool too, Boston maybe? Joel is pretty tight.

Hilarious, in a nerdy math way. His attempts to be funny are pretty humorous. Occasionally he will provide "scientific" demonstrations which usually involve the class laughing confusedly. Class isn't that hard, but difficulty here is dependent on your position with Calculus.

Great teacher with great wardrobe

Maybe it was just me, but I found him to be VERY sexy.

AWESOME!!!

Kinda sounds like Ray Ramano. Funny guy. Lectures went slow if you took Calculus before. Midterms and finals were harder than the samples.

Hass explains problems and concepts very well. His examples are varied and relevant to what he is teaching. His midterms and finals are harder than the hw assignments and the samples. Overall, he's a good teacher that is willing to help and is interested in what he is teaching.

Interesting

I had Hass for MAT 21A last quarter and it was great! His teachings are good and clear. he does his best to make the class fun to everyone. His tests and midterms are not hard at all if u understand the material. He is a good teacher so take him. Plus,he'll curve the tests and final grade so yea. :)

Prof Hass is a G. His lectures are very straightfoward and clear, and his exams covered everything included in lectures. Hass also tries to lighten up his lectures by occasionaly bringing experiments so his students can better understand the topic.

Very good teacher. He is there when you need his help, and his is entertaining while he is teaching. There are no suprises on his tests, but be sure to study more than what is on the practice exams he gives. Overall, he was my favorite teacher I had during the quarter.

Hass is a great professor, i highly reccomend him. He brings in demo's which are really entertaining. The homework can be long and is much harder than the material he covers in his lectures, but work with friends and ask the TA's. his tests are reasonable, nothing unexpected. Great teacher

he is one of the easiest math teachers on campus. his midterm and final are easy. however, this means there is not much of a curve. the final is worth 55% of your grade. he has some funny demos that make the class interesting. practice final and midterm are almost exactly like the real thing!!!

reminds me of ray ramano. hes a good teacher; pretty funny guy, but lectures can get boring. tests are very basic.

Fun guy. He does in class demos and is really neat. His midterms and finals are pretty average. There was about a 4% curve in my class. Take him if you can, it is quite an experiance.

The BEST professor! He is very clear, the final was a little tricky, but fair. Very clear!

That's so funny that he reminds someone else of Ray Romano...he definitely sounds like him! Besides that, his class is really easy and lectures are actually pretty interesting. Great professor!

Had Hass Fall 05, and found his explanations clear and concise. He had fun demos, he always spoke well. I had Calculus coming in, though...my friends did not and they struggled thanks to but ONE midterm and the final. Probably a better professor for someone that has previously taken calculus, but still enjoyed his class.

Although he made some simple mistakes, they were easily overlooked. His lectures were always interesting because he used good demos. The midterm and final were both pretty straight-forward (I took Calc before in high school). I would be taking him again if he were teaching 21B.

Pretty easy class... If you've taken Calc before, should be a breeze. But I'm pretty sure if I hadn't, I'd be totally lost. The midterm and final were both pretty easy... especially in comparison to the AP test (for AB). His lectures were interesting... some pretty funny demo's. I highly recommended

Very good teacher, homework is mandatory worth about 15% of your grade and is pretty easy. Midterm and Finals are pretty fair, if u study no reason u shouldn't get a B or an A in this class.

I liked the teacher. He kept math intresting. Had some funny word problems and such. I didn't like the homework system. The tests were fair, but usually harder in difficulty than the practice ones(They had all the same concepts as the practice exams.).

One of the best math teachers on campus...makes the class fun and interesting (at least for a math class)

he was really amusing, but i found the tests to be a little tricky. the final was worth 55% of the total grade, so watch out for that. he didn't curve the final grade AT ALL, which i wasn't expecting. demos were great - hilarious and not very relevant. good word problems, online hw is super easy. take this guy, he's awesome.

pretty straight forward. his tests are very fair, they cover the information you should know, not miniscule details. i got a B, but didnt do pretty good on the midterm! he tries to make it fun the best he can!

Very good professor. The exams are very fair and straightforward. Homework is given weekly and is very helpful to understand the material.

One midterm, four quizzes in discussion, and an in-class final. Homework was online which made it extremely easy. The homework and examples in class were almost the same stuff on the exams, so if you go to class and try to understand, it's an easy A. Hass is good at teaching the basics and that's all he requires you to know on his exams. Great Prof

One midterm in class(25%). 4 Quizzes in Discussion section, lowest one dropped.(20%).Online Homework, easy credit( 15%).Final(40%). MIdterm and exam are straightforward. No Need to worry about hard proof. Easy Professor in the math department.

I didn't do well in this class but that is definitely attributed to my attendance (or lack thereof). This guy is awesome, when I did attend, I was amazed at how well he described things and his exams weren't too difficult. The online homework was relatively short and easy. I hope I can get him again when I retake it. Highly recommended

He's a cool guy, midterm was hard but I ended up doing way better on the final, which wasn't as difficult. Homework and quizzes really help boost your grade so do well on those.

Hass is a great topologist, and a great guy. The class was very good overall. As someone who likes the subject a lot, my main complaint is that the class moved to slowly (e.g. we didn't really get to De Rham theory). Also, HW problems could've been more interesting/challenging! Overall, though, a solid class.

Prof. Hass explains concepts and examples in a clear manner. Although the homework is time-consuming and complicated, it really helped me to understand what's going on. Make sure to start early and you will be fine. 1 Final and 1 Midterm is not too bad. Overall, not a bad class, the only scary thing is the HW.

He's a nice fellow that can give a lot of info during lectures. Don't do the homework in one sitting. Even though it is easy to get an A in homework, it takes a long time. Most of the twenty questions have 1-5 sub-questions so they take a lot of time. Additional time if you want to get everything perfect. I took APCalc so it easy.

Prof. Hass is a very relaxed professor. His exams reflected the homework problems with a little more of a punch. Attendance is not mandatory but highly recommended. Really knows the material, the only downside was the time constraint he had to present the material. Overall a great professor. Very friendly in Office Hours and makes concepts clear.

If you had prior experience in calculus, this class should not be too difficult. His lectures go over only the basics of each topic, so outside practice is required to learn harder problems for his tests. He drops the lowest quiz and homework, which is nice. His tests seemed simpler and more straightforward compared to the other 21A professors.

Explanation of the theory behind the subject was great and really deepened my understanding. Tests and exams are difficult to prepare for, but if you attend lectures and solve some past exams it is possible to succeed. Very challenging class but worth it.

I should have appreciated him more while I was in his class! Very easy to understand and passionate about the course.

If you've taken Calculus before, you shouldn't have many difficulties in the class because Hass is a great lecturer. He's concise but also helps you develop a better understanding. Like someone else said, the TAs grade your quizzes, midterm, and final, and they can be very harsh graders. It's not Hass's fault though.

great lecturer easy A

MAT21A was a breeze with Hass. I took high school calc so none of the material was new, but he presented in a straightforward, concise manner that made it easy to sit through. Weekly homework easy, some quizzes in discussion and one midterm and the final. Very, very, very straightforward and easy if you have taken calc before.

As an actual author of the textbook you have for this class, he knows (mostly) what he's talking about and provides pretty clear examples for things. Goes at a fair pace and lectures are pretty easy to follow. Just beware of falling asleep in class as he has the voice for it. Otherwise, he's pretty funny and is one of the better math professors imo

Hass is sick

Midterm and Final was simpler than homework. Very hard to find a 21 series professor like Hass who anticipates that many students aren't very advanced at math. He assigns very little homework that is worth 20% of grade and designs his tests without any tricks, just extremely basic problems. Overall a very engaging lecturer as well.

For a class as daunting as 21C, Hass is as good as it gets. The homework wasn't too bad, the midterm was normal difficulty. But then the final was incredibly easy, almost out of nowhere. He's a super nice guy who is pretty useful in office hours, and compared to other math professors, about as good as it gets. Not perfect, but you will do well.

Every tool to succeed is there and Professor Hass is very helpful. Majority of the final grade was based on the midterm and final but there was a lot of helpful homework and practice exams.

Really funny and down to earth, cares about his students. Doesn't believe in trick questions, just wants to know that you understand the concepts that he teaches. Your grade depends highly on your exams (midterm was 30%, final was 45%).

Great guy.

World best math teacher. Very inspirational and funny. Only one midterm needed and no weekly quiz. Five attempts for homework questions so it is easy to get full marks. I love him! Definitely would take him again.

Joel Hass actually put effort into his lectures and didnt just simply follow the textbook. He was willing to answer questions inside and outside of his class and his tests were very manageable. Homework was 20% of the grade so that was definitely an added bonus.

Overall, a very solid Math professor. He's funny, and explains the information pretty well. His midterm was fair, and the final was as well. No quizzes, so besides the tests it's just homework thats required. He's pretty chill and so is the class!

He was a good lecturer for sure. He explains things clearly and occasionally cracks jokes. I didn't need to read the textbook at all. There's also easy online hw to boost your grade. As for his tests, they're straightforward. He tells you that he's testing for the knowledge and isn't trying to trick you and he means it.

Dr. Joel Hass is the best calc prof you can get. Most lower div math classes are awful, but he was amazing at explaining and clear about what would be expected from tests. Relatively minimal HW that would prep you for the exams. He's a fantastic teacher. That being said, I was 0.2% away from the next up grade but he wouldn't curve me...

I took AP Calc in high school so most of his class was review, which made this class extremely boring and I took notes every 10 minutes of lecture. He's a genuine guy and wants his students to learn. Tests are definitely the easiest of most profs, but a LOT of ppl still failed. Our averages were not that great and he didn't curve at all, annoying.

He is very smart and it a little quirky

Hass is a good teacher. Goes through lectures slowly with a lot of examples although it can still be a challenge to understand. The homework on Pearson really helps. Textbook is not needed although it can be useful. He drops lowest midterm and lowest quiz. There's a weekly quiz which are easy. Would take again.

Hass is at least tied for the best Calc21a prof with Chanellor. Calculus, however, is difficult and sometimes students who have already taken Calc my struggle. Exams are very straightforward if you learn a specific theorem for the first exam and easy throughout. Low midterms, quizzes, and homework are dropped. Some homework, but easy overall.

He kind of assumes you have a background in calc but has office hours and answers questions outside of the textbook examples. Lectures are live but recorded and posted, weekly quizzes, lowest midterm dropped, short midterms three questions. If you put in the work you should be fine, he is willing to help if you go to office hours. homework 2-3x/w.

Professor Hass is pretty cool guy! He is hilarious without even meaning to be, so that is great. The grading is very generous, but I supposed that relies mostly on the TAs. Your tests are graded by all TAs, not just yours, so that is a downside. There are three midterms, and a quiz each week. The lowest of each is dropped. LOTS OF HOMEWORK!!

The homework is exponentially harder than both the quizzes and the midterms. If you can do the homework without Symbolab, you're golden. Class is easy, homework is long and a drag, but the class is an easy A.

Professor Hass gives decent amount of homework (usually 3 per week due on mon, wed, and fri). His tests are not tricky and pretty durable. Do your homework and go over the materials before the test one more time then you should be fine. He also drops one of the midterms with the lowest scores so it takes off a lot of burden off your shoulder.

If you took high school calculus, this class is a breeze. If you did not, you have to supplement the lectures with YouTube or ocw videos. Tests are super duper easy. Weekly quizzes sometimes cover more than what is taught in lectures so make sure you know how to do all the example problems in the textbook. Go to OH if you have questions!

30% HW (3 a week), 35% quizzes (weekly, drop lowest), 35% midterms (3, drop lowest). Took Calc AB in high school and taking it with Mr. Hass was so easy. He is not the best lecturer, but quizzes + exams are easy. He is very lenient on grading. If you did not take Calc before, you have to do a bit more work. If you took calc already, EASIEST A EVER.

Homework can be pretty tough, but still very easy to get full credit because he gives you a lot of attempts. Tests and quizzes are pretty easy and straight forward, he doesn't like to give trick questions which makes the tests easier. He's very structured, his lectures are easy to follow, very easy to understand as well.

His online class is structured very well. Homework is challenging while the quizzes and midterms are more simple, testing the important concepts rather than giving you tricky and difficult questions. He also has a very soothing voice and is very kindhearted!

I had no calc background!!! Go to office hours if this is you! He does a lot of proofs in his lectures, making his homework sometimes difficult to understand at first so get a HW buddy! Therefore, consider reading the section you predict that you will go over. I am at an A- rn because midterms are tedious. Quizzes are very fair. Just put in work

Took calc AB in hs so this class was relatively easy. He's not the best lecturer, he did many proofs which were sometimes confusing, but he's very generous in dropping a midterm, a quiz, and 2 hw! 3 midterms which were usually easier than the weekly quizzes. Online hw was pretty time-consuming and difficult at times but examples are provided.

Professor Hass is very knowledgeable and genuinely wants students to succeed. I had calc background from high school, so this class was pretty straightforward and simple for me. Office hours are very helpful! No final, but 3 midterms that are worth 35% of your grade and weekly quizzes. HW is easy points! He cracked a few dad jokes too. :) Take him!

Offers a lot of OH which makes the class much easier. He has a great way of explaining, and the homework feature was very helpful in understanding the content. Quiz every week which can seem bad but the content in them is explained during the discussion beforehand and the quizzes are a great way to study for the midterms.

Great professor! He gave us practice exam before every midterm. By the way, there are three midterms, and the lowest one will be dropped.

The quizzes are straightforward and simple and he provides multiple practice midterms beforehand. The lowest quiz score and midterm score is dropped! Hes a great professor!

Professor Hass really did a good job of explaining different concepts and providing comprehensible examples. There were really only one or two concepts that he taught that were really difficult to understand but overall the class was great and I would really recommend Professor Hass for anyone taking MAT21A.

Hass is a great professor! I forgot a lot of calc from HS, but his lectures were straightforward and he gave a bunch of examples, so I was able to relearn it all pretty quickly. Weekly quizzes are based on material gone over in lectures before. 3 midterms, but he drops your lowest one. Overall, super caring and great at teaching!

Professor Hass explained really well during his lectures. The homework was every other day basically and while tedious, I never felt like it was too much. His quizzes and midterms were clearly what we covered and he drops the lowest quiz & midterm too. Just stay on top of lectures and homework and you will do fine. No final.

Great lecturer! Homework is pretty simple and he gives out three midterms but drops one. Also, no final (may have been because of covid-19 tho). Overall, easy class.

Professor Hass is great at explaining concepts/problems and his quizzes/exams are much easier than his homeworks. His homeworks are difficult but the web application he uses offers amazing hints/help so that you can do the work and receive credit. His course is perfectly designed for the quarter system and he's the best I've had so far.

Explains concepts very well

Hands down best math professor I've had at Davis. Lectures are clear and even make series look easy. Tests are super fair and mainly cover basic understanding of concepts covered in lectures. Homework is very doable and gives plenty of time for each assignment. He should definitely be your #1 pick for your next math class!

Exceptional and entertaining lecturer. Make sure to attend lectures because the textbook is not as clear.

Reading the textbook beforehand is helpful for lectures since he doesn't go over every detail, but he DOES explain concepts very clearly and simply. There's usually not too many problems per homework, but you get homework pretty often so stay on top of it. Midterms were straightforward although final was definitely tougher.

21C isn't easy, but Hass gives you the best chance to succeed. He really cares about the material AND the students. Lecture is great & essential to understanding hw (harder than exams) & tests are 70% of the grade (15/15/40) w/ no curve, but he makes up for it by only putting simple examples on exams and giving HELLA partial credit. Banger prof.

There's a good reason Hass has the reputation he does. Both lecture and the textbook are helpful in understanding the subject matter. He does an excellent job easing his way into more difficult topics without making you feel lost. I would highly recommend taking 21C with him if possible.

Professor Hass is a great lecturer and explains topics well. He is indeed very test heavy but exam problems are way easier than homework problems and he gives a decent amount of partial credit. My biggest issue was that the final was heavier on the last chapter than he let on but I could've done better too. His grade cutoffs are very generous.

Hass had really helpful lectures and the material was presented clearly. Two midterms, a final, and lots of homework. Passable class if you work for it; I had an 86% until the final. Definitely take this class.

Professor Hass is an incredible professor. He explains difficult concepts very well, and is clearly passionate about math and dedicated to his students. His homeworks are a lot of work, but worth it, and the test problems are much easier. I would also recommend using the same homework program (MyLab) for the Study Plan and to practice for tests.

I love Hass. He is so knowledgeable and knows how to lecture. He is one of the best math professors I have ever had. He is very genuine and his lectures are very informative. His questions on his midterms are very direct. He does not want you to fail and mess up. Take him if you have the chance!!!

Engaging lectures and was very passionate about subject. Tests were nearly identical and even easier than practice exams he provides. A little MIA outside of lectures.

Greatest lower division calc experience I've ever had. Take this professor! Lots of homework but it seriously helps prep you for the texts. Final had damn near everything we went over in the quarter but no one did amazing so we had a solid curve. Bless Hass

Excellent professor, made the class so much easier to understand. Lectures cover material in the textbook (though it is helpful to do both lectures and readings), and tests aren't too difficult and are comparable or easier than HW (as long as you study!). Lectures can get a bit dull but Professor Hass tries to make it fun. GET THIS PROFESSOR!

Lectures were a bit dull, but Hass was enthusiastic and midterms reflected the material well. Kinda a lot of hw but it was helpful for preparing for exams. Final was surprisingly hard.

Great professor with clear grading criteria

Professor Hass's lectures are really clear. His lectures are also friendly to international students because he speaks slow. You have chance to ask questions every time he finished a new example or knowledge. He published his assignments on Pearson and you have many chance to redo it until it's correct. His discussions are really helpful too.

If you have never taken calc before take this professor. 30% of your grade is homework there is a lot, but it is nice because it gives you room to do poorly on the tests (you'll get 100% in this category if you do all the assignments) and helps you learn. 1 midterm and final. Generous with partial credit. Lectures are hit or miss. No/slight curve.

Had I not previously taken calc, this class would have been much more difficult. Would recommend for anyone with calc experience, but not for someone new to calc.

He is a great professor, but final was 45% of your grade and there was little to no curve. Good professor if you have taken calc before.

OK class for people with high school calc experience. Dull lectures and learned mostly from the homework. Lots of homework, but helps you study for the tests and is worth 30% (basically free points if you complete all the homework). One midterm (25%) and one final (45%) with no curve... Also gave no partial credit for the final! :(

Ok lecturer. Everything on the homework is on the exams, which were a piece of cake compared to AP Calc exams in HS. Only one midterm and 30% of the grade is from HW. He lets people join lectures on zoom and records them as well.

Lectures were very clear and used real-world examples that were easy to understand. Hass frequently stopped to check for understanding and answer questions. Tests were reasonable. MyLab homework provides a lot of support. Discussions were optional but helpful. Easy if you've taken AP Calc. Even if you haven't, he's a great professor and nice person

When I took the class, our grade was one midterm, homework, and a final exam. You had to do really well on the midterm and finals since the homework was so little of your grade. I took AP calc AB so this class wasn't too bad, especially since the homework mirrored what he would ask for the exams. Overall, I would take the homework seriously.

icon. hw after each lecture with multiple attempts that helps buffer grade. lectures were funny and clear. not too bad, but took ap clac ab and bc. practice tests given for midterm and final.

Professor Hass is a kind guy and likes to crack jokes now and then in his lectures. His class is test-heavy, so make sure to study for the midterm and final. Some questions on the practice midterms and practice finals are identical to actual exam questions, so make sure to look over your practice exams. Don't forget to do the homework, good luck!

Easy A. Just do the homework, listen carefully in class, and spend some time doing his sample exams. Sample exams might not be very similar to the real one, but the real one is easier. If you feel good about the questions in homework, discussion, and sample exams, you should be fine with his tests. His lecture is clear and easy to understand.

Excellent lecturer breaks down complex topics like it's basic addition. Attend lectures, do practice problems from books, and do homework by yourself if you want to absorb information. TAKE ADVANTAGE OF EXAMPLE EXAMS BEFORE MIDTERM AND FINAL!!! Midterm and final are hard, so you want to KNOW the material. Hass gives you all you may need to succeed.

Very knowledgeable and experienced professor and co-writer of the textbook. Goes deep into the concepts behind the material. His tests and assignments will guide you into a deeper understanding of the content. I appreciated his humor and when he threw a fake egg at the ceiling.

SO much homework, thrice a week. Final was 40% of the grade. That being said, no contentions with Hass's teaching he did a great job of outlining the syllabus and covering topic, though it could be boring at times

Not great for someone without Calc experience, but nobody is; Calc here is way too fast paced. Ok lectures---should be better considering he wrote the textbook, and is well known in his field. HW (30% of grade) acts as a curve. Time consuming, but unlimited attempts. 1 midterm & a final. Class was fair, and tests were well written. A solid option.

Professor Hass is knowledgeable and engaging, but the course material can be challenging, especially for those without prior calculus experience. Attend lectures, do practice problems, and use tools like Unstuck study to prepare for the midterm and final. With dedication, you can succeed in this course.