Smart guy. Preferred to show off than teach. Textbook was helpful but he said the textbook had wrong info although all the homework problems came from it. Gave extra time to complete homework but some people complained that he never added their homework score to the final grade and never responded. Should honestly stick to research.

Honestly had such a bad experience in this class. His lectures were nothing like the tests and the tests were 10 times harder than the homework. 0/10 would recommend.

Absolutely terrible at explaining the material, i learned everything I knew from the discussion section and the homework. He left and unreasonably huge amount of homework and was an incredibly difficult grader. He would mark off on test for literary anything. was not upstanding at all to students and didn't all allow a note sheet on test. DONT TAKE

His lecture is so confusing!The homework and quizzes are nothing like the lecture. I am basically self-learning, spending all day on the homework and preparing for the quiz. This is the first semester I transfer to USC, I have to say it's really a bad experience even though it's only been a week since the school started. Miss my old math Professor.

The worst mathematics Professor at USC, on the first day of class states I don't like the book so we are getting a different book but I also don't like the book. His lectures are long and sometimes he doesn't even know what he is doing. The midterms are extremely long and you have a 95% chance of not finishing the exam. some problems had 10 parts.

By far the worst teacher I've ever had! The lectures are pretty straightforward, but the tests are very difficult. Questions don't match up with what we covered in class and there are way too many to finish in time. Average on the first test was a 59% after the curve. My discussion started with 12 people and ended with 3 because everyone dropped.

Quizzes or tests are 10x harder than any homework or in-class questions. When he goes over questions in class he skips over steps and assumes that everyone knows how to do it but it just makes it even more confusing. Half of the class dropped after the second midterm. I used to love calculus, but I would not recommend taking it with this professor.

He doesn't explain anything, his writing is messy, and he expects us to know what his abbreviations mean. I got high As in all my high school math courses... and I had to withdrawal. Do not recommend his class.

Prof Dreyer is obviously a nice guy, but his lectures don't make sense and the homework takes forever. Also, the level of difficulty of what he goes over in lecture is no where near as difficult as quizzes and midterms. I've never spent so much time studying for math to get such horrible quiz/test scores. NOT WORTH IT...

Professor Dreyer is hard to reach, he doesn't answer his emails, and he doesn't specify how he grades his quizzes and tests. Overall, I expected so much more from my first college math professor and this class has turned an already bad freshman experience into a terrible one.

A VERY bad math teacher. This is supposed to be a 100 level business math class, and the guy teaches it like it's a high level engineering math class. Lectures make no sense. Homework is nothing like the tests. All tests and quizzes are beyond difficult, expect to fail. SUPER HARD class. Do NOT take him unless you are an incredible math student.

Not a good teacher and grades terribly.

There's a reason why his score is so low. Weekly quizzes, extremely difficult midterms/finals, and not at all receptive to feedback. Many times classmates and I tried to discuss our concerns but he was stubborn and instead blamed it on our lack of studying. I did very well in hs calc but this prof made everything overcomplicated and difficult.

Easily the worst and hardest class I have ever taken at USC. He was not helpful and whenever concerns about the class were brought up by classmates, he would blame students and tell them they were not studying enough. Quizzes and tests do not reflect material that was covered in lectures. Tough grader and a bad professor. DO NOT TAKE HIS CLASS!

Do NOT take Dreyer unless you have a very strong math background, like superhuman. I love math but ended up switching profs along with four classmates. He's very intelligent but does not respond to emails, blames students for poor grades, and makes calc much harder than it needs to be. You'll learn a lot but it will come at the expense of your GPA.

Math 118 is a very hard class at USC no matter the professor. However, Dreyer was never accommodating and taught the bare minimum during the lectures. As a result, the quizzes and midterms were way harder and not reflective of what we learned in class at all. Did well in AP Calc but still had a C- before the final so I ended up taking it pass/fail.

Hes insanely tough, doesnt take feedback well, blames his students for poor results. The AVG on exam1 was 40%, he blamed his students for not studying enough. Said he doesnt understand how ppl who failed his test are at USC, we dont deserve to be in STEM, and we should go back to first grade math. His quizzes are impossible to finish, beware.

Avoid at all costs. Although hes a smart professor and usually available through office hours, he is the hardest professor Ive ever taken and can be very rude/condescending. Class is entirely creative math, if youre not that good at math, youll be done for. Went in thinking I could scrape by, regretting my decisions. Avoid him !!

I was always pretty good at math and enjoyed it. I got a 5 on my ap calc exam and took BC calc in high school and qualified on the exam. That being said calc 126 was the worst class I've taken at USC. I had to withdraw from this class because I wasn't going to pass. Dreyer is condescending and although passionate, horrible at teaching. Beware!!

I've always loved math. This guy made me hate the subject as a whole. Snobbish person. Extremely hard tests and quizzes with unrealistic expectations. This class had the highest drop out number and p/np takers. Avoid him at all costs.

He has so many low reviews for a reason, worst professor Ive ever had in my college experience. Unrealistic expectations and should be more understanding/lenient with students. Hoping he will improve. He is generally nice, but very very tough. Avoid him

His class was such a horrible experience I needed to drop, he is so confusing and gives the hardest exams ever. He also belittles you if you do bad on exams, even though a professor should help you and not make you feel worse for doing bad on an exam. Ended up dropping bc i couldn't stand taking such a horrible professor. stay away, seriously!

I should have listened to RMP before taking this class. Hardest I've ever worked. Extensive hours of studying, got tutoring, went to office hours, joined study groups and I still failed. Impossible quizzes, low test averages, long homework. Obviously smart classmate was killing the quizzes but failed midterm bc of unclear grading.

very confusing/couldnt explain himself at times.

Professor Dreyer's class is not an easy class at all. If you have the opportunity to take another professor, take it. I had to study so hard for the final just to pass the class and he grades the midterms really hard. He expects you to complete problems a certain way and if you don't, he takes points off. Very hard class and not my favorite prof.

This is by far the hardest class I've taken here at USC. Prof. Dreyer's explanations are terrible-forcing me to learn material on my own. His quizzes are nearly impossible to do well in. His TA is ahem not very good either. This class gave me hella stress/anxiety/depression/hopelessness/hatred towards math and stem/and a hatred toward the math dept

Confusing lecturer, does a worse job than my high school AP stats teacher. He preaches about having high standards, but then we need to correct him numerous times during lectures because he can't stop making mistakes. Whenever we ask him some harder questions, he says "Oh I can't figure this out on the board." Then why are you teaching here?

It's supposed to be an easy course compared to other cal classes I've taken here, uhhh the only thing that sets apart from other classes is just confusing lectures. He does not follow textbook's order, and it seems like he's bragging about his math skill. Don't take unless you have no other choices!!!

Lectures are mid. Exams and quizzes are insanely hard.

I took this intro level class in 2018. Now, I'm a math PhD candidate at another university in the US. When I recalled the day with this guy, it is a disaster. I would like to give him a 0 rate if I can. This course costed me $8000 and I want to demand a refund of the tuition. He's not serious about teaching, and he didn't intend to teach.

Not a mean guy, just a really bad teacher. Unable to explain well, partly because he is not fluent in English. Ended every lecture (not exaggerating) 5-10 minutes late, and the HW sets were completely divorced from lectures. Discussion sections were taught by a TA who was even more incompetent than Dreyer, Elif Uskuplu. Take at your own peril.

His class was horrible. I struggled so much and received no support from Dreyer. He expects more from his students than himself and cannot answer questions. He cites that "students are more trained" than him. He also belittled and made comments about my background.

Avoid at all cost. Most confusing professor in the department. Does not care about students. TA does not know what the professor is up to. Only a few students can follow what he is saying. You should consider if will become one of them.

If you are taking MATH225, never take him. I know that he cares about students a lot, but the way he teaches, the way he requires proof, and the particular way of writing answers will make you suffer. Weekly homework and weekly quizzes are doable but require you to self-study more than you possibly can.

Please avoid at all costs! Awful lecturer, tests and quizzes irrelevant to lectures, if you are not a math genius you are going to suffer in this class

DO NOT TAKE THIS COURSE! Makes all content way more difficult than it should be. Homework is only 4% and takes loads of time. Weekly quizzes which are extremely stressful and time-constrained. Homework overall doesn't correlate to quizzes and tests, and notes are illegible. Way better professors I would not take this class under any circumstances.

Extremely difficult class, there was no syllabus or clear guidelines for what he expected. graded only on 4 assignments that have very vague instructions, but if you don't do exactly what he wants you will get bad grades. I went to office hours for help on an assignment and included exactly what he told me to include and I still failed it.

RUN! This professor scribbles in messy cursive. He gives you nothing to use as practice material. Makes quizzes and exams unnecessarily long and difficult and not enough time for you to finish. The material is difficult but he makes it worse. Other professors teach the class much better. Avoid at all costs!

DO NOT TAKE CALC 3 WITH HIM!!!! He was so fast paced and taught like we knew everything and it was just a review. So hard to understand him and his teaching style. Had to drop this class because I got 3/15 on the first few quizzes. Do not take with him if you want to have a good life!

Avoid his class at all costs. He gives very vague answers in office hours. He will always tell you to go read the textbook if you're confused. He does not communicate any information about the curve until there are 4 weeks left in the semester. I have never left a rating on rate my professor, this is my first one. Do NOT take his class!!!

Guillaume is a very smart guy and clearly has passion for mathematics. However, he is a sloppy lecture, gives unnecessarily long homework, and gives weekly quizzes that have nothing to do with the lectures or homework. I emailed him one to set up a meeting and he never responded and I regret taking this as an intro course.

I would 1000% not recommend taking his class. I stopped going to lectures after the first midterm and by the second one, although I had a lot of catching up to do, I did A LOT better (almost doubled my grade). Prepare to teach yourself, cause personally every time I went to the lectures I just ended up leaving more confused than I was when I went.

He will catch you if you use your phone in the class.

I think my roomate's two brother could teach calculus better. He might as well be a two year old with his frequent temper tantrums and his habit of throwing markers. He "teaches" like everyone in the room has had years of calculus experience instead of being in calculus one. Save yourself and take anyone else. If I could rate him a -10, I would.

Imagine the worst professor you could and multiply that by a thousand.

DO NOT UNDER ANY CIRCUMSTANCE TAKE THIS DUDE. This is quite literally the worst teacher I have ever had in my life. He says that showing work will give you partial credit but this is a total lie. There is a weekly quiz that is so hard none of the studying you can do online will help you. SPARE YOURSELF PLEASE.

Dreyer is an insanely tough grader, he's clearly very passionate about math but that's definitely one of the reasons why his class is so difficult. He wants you to clearly outline the steps you took to solve a problem but won't give you partial credit if you do so it kind of seems pointless. He'll often go on rants about how bad your class is doing

Guillaume clearly has a passion for math, and he is a nice guy. But the way he teaches this class is horrible. He doesn't use Brightspace, he provides no resources, and the tests and quizzes are impossible. The hours of tedious homework alone made me hate this class, and there are zero resources besides your TA, and you'd better get lucky.

Don't choose any courses of this professor. What he teaches in class is very vague. The homework is almost irrelevant to what he teaches. The weekly quizzes and exams are very difficult and the grading is very strict.

Do not take this class. Worst professor I've had. I went to almost all lectures, sat in front, and attended almost all office hours until an uncomfortable encounter that felt discriminatory. Despite all my effort, he doesn't care about students. Grading is harsh even if answers are right. Quizzes are hard and very annoying. Avoid this class.