If you haven't taken Calculus AB in high school, you will struggle with this class. The professor moves extremely fast and makes topics more complicated than need be. The workload is very manageable with only 2 questions a week, but if you want to do well you need to complete the entirety of the homework even the questions not assigned. You are allowed a paper front and back for both the midterms and the final so that will save you, as all the problems on the midterms are from the homeworks. It is a manageable class because you know that the problems on the exams will all be from the homework and you can simply copy every problem down, but the actual learning of the content is extremely difficult.

This class was the first math class I took at UCLA. I thought that it was a pretty good class, as the teacher was very thorough with his work. Furthermore, the TAs would have a weekly discussion which helped solidify the information learned through the week.

The tests were difficult, however some of the questions would be extremely similar to the ones on the homework, which was helpful. To clarify, he would give you a homework set with around thirty problems, but only a handful of the thirty would be required to submit within that homework. He would then take some of the examples from the thirty problems and use them on the exams. He would also drop one of the two midterms, which was great as the second midterm seemed to be much easier than the first.

If you have the option to take another professor for 31A, please do it. I switched majors because this class made me hate math so much. He teaches his lectures quite literally at the speed of light and pauses for 0.0001 seconds when asked if we have questions. I went to every 8 am lecture and tried my best to understand the content. I did decent on the homework and the midterm but badly on the final so my grade plummeted. His exams are entirely based on the homework, practice exams, and lecture questions, and even tells you exactly where he gets them from, so I would recommend looking at those in preparation for the exam. Make sure to listen at the beginning of the course, because if not, you will be really confused by the end. Office hours were helpful but extremely crowded. He's a really nice guy but the class was so poorly taught and I would recommend you take another professor for 31A if you have the chance, especially if you are not great at math. If you are naturally good at math, though, and willing to teach yourself a large portion of the content if needed, then taking him would be fine for you.

As someone who had not taken any calc classes in high school, this course was EXTREMELY difficult for me. Wu's style of teaching was 10% explaining and 90% rushing through practice problems. He records his lectures and I found that watching them at your own pace was more beneficial than being in class.

The tests consisted of the hardest problems possible taken from worksheets. Wu lets you have a cheat sheet on the MT/final so I would recommend that you just shove in as many HW/class problems as possible on the sheet. He doesn't curve most exams despite students doing terrible on them. I will admit I could have put more effort in the class, however, I found it not worth my time/frustration and I would recommend avoiding Wu as a professor.

I thought Professor Wu was great! His lectures weren't too hard to follow as they were super practical and they were recorded so I could always rewatch if I missed something. Also tests were given curves, so failing shouldn't be that big of a worry.

I was very frustrated with the fact that I had friends who completed 31A just a quarter before me and genuinely had no clue how to even help me with my 31A homework. The problems were very complex and reaching out for help from people in 32B they had no clue to how to go about solving these insanely niche and complex problems for the course. None of the further-level math builds upon any of these complex questions he would give us.

There was no textbook. The class consisted of one homework assignment each week, 2 midterms, and a final. Professor Wu was adaptable and did a lot of examples in class. He also would go over homework questions in office hours. The midterm and final questions were based on the homework. It was very easy for people who had taken calculus before, and still manageable for those who did not take calculus in high school (as I hadn't).

I didn't take AP Calc in high school and I would say that is a very crucial part of how you do in this class. From the very first day of the lecture, I was confused along with other peers who had little to no experience with Calculus. People who had taken AP Calc got the hang of the class better. I think Professor Wu is a nice person but he made understanding concepts harder than they needed to be. Most of the time lectures were rushed. The final was also harder than expected. I had to self-teach myself a lot of the material because it was hard to understand in class when everything was going fast. I would recommend looking at the practice midterm and finals as he included some questions from both into the actual exams. There is no extra credit given, and there is barely any rounding of grades. The final grade is based on two exams and the weekly homework, which is only three questions. I will say that there are some free points given in the homework because the last question in the homework is almost always to ask your study group a question. Your homework with the lowest score is dropped.

Professor Wu's lecturing style was a bit rough at the beginning of the quarter, but he did have an anonymous Google Form where he accepted feedback from students about this particular class. I highly, HIGHLY suggest going to Professor Wu's office hours. At least for our quarter, he did not shy away from answering homework problems directly from the sheets he has given us. His office hours is the perfect way to ask for help and they helped me personally get better at understanding his style of midterms. For the midterms, he didn't allow us to use a "cheat" sheet but on the final we were allowed one piece of paper for reference. All of the questions on the tests are directly from the lecture notes, lecture examples, and homework sheets. I highly recommend doing the extra hw problems that are not required because those tend to show up on the exams. Overall, the grading scheme is pretty fair. If you were stuck with this professor as your last resort, you should be fine. He improves as the class progresses. You can definitely tell he knows what he is teaching based on how often he emphasizes examples and theorems. If you've taken Calculus AB before, this class should be review. If you haven't, I can totally see where this class can seem confusing. Just go to office hours. They are the best.

Not sure why Wu has so many negative reviews. I think his class was great! He may need some improvement in the teaching department, but he’s a really nice teacher and friendly overall.
Regarding his teaching and lecture, he’s thorough and very formal; he doesn’t give a lot of shortcuts. He’s easy to ask for clarification in lecture, though. For lecture, he posts the entirety of his notes. To do well in the class, I recommend going over these, especially since the examples there are often referenced on the midterm and final. If you’re lucky, you’ll recognize a problem from this (or homework) and the tests will be easy.
Speaking of homework, he assigns a few (2-3) required problems, but many other optional questions. You should do the optional questions to do well on the midterm and final. Homework is worth around a quarter of your grade. If you have any questions about the homework you can ask on Piazza, and he usually responds pretty quickly. The TA’s such as Chang give the homework solutions for most of them. Wu doesn’t give solutions for the homework.
He doesn’t have tests and quizzes, only two midterms and a final. For these, they’re composed entirely from the questions of homework and lecture notes. The midterms and final are cumulative.
For grading, he grades to your benefit. There are two grading schemes, and he will choose the one that results in the highest grade for you.
In sum, I would recommend this teacher if you’re willing to work hard.