This is my first time actually leaving a review on bruinwalk, but wanted to do so because Professor Rubin was just so amazing, I just have to let you all know that if you have an opportunity to take this class (or with any class with him), then do so!

I was really nervous about multivariable calculus; math was never my strongest subject, but Professor Rubin was just so clear and engaging during lecture that I was able to understand what was going on and paid attention. Professor Rubin would go above and beyond to make sure that his students understood the material. His classes never felt "rushed," but managed to teach everything he planned. He was very respectful about answering questions students had and spent extra time on material that multiple students were confused about. He never tried to "squish in" a new lesson or topic in the last five minutes of class, never go over it again, and expect us to fully understand it for a test.

In terms of workload, this class was moderate. Quizzes accounted for biggest chunk of the grade, and he dropped the lowest two. We had 9 quizzes (Week 10 quiz was cancelled). There were five problems on the quiz, 3/5 were directly from the HW, 1/5 was a True/False based on a theorem we went over in class (read the textbook and you will be fine), and the last problem was a short answer style where you would have to "prove" something (not necessarily a "formal" proof, but an explanation). In summary, just do the HW and you will do great on the quizzes. The tests were a bit tricky and required some creative thinking but were overall okay. But again, I took this class online and also had 24hrs, open notes, and open internet (but no collaboration), so it might work differently in-person. HW was optional, but HW problems were on the quiz so I did all of them.

Another thing I really appreciated about his teaching style was that he did not regurgitate the textbook. He might word-for-word write down complex theorems, but he always went over them in "normal" English, and connected them to simpler concepts we already knew. He is very talented at explaining things and can turn any complex problem into a simple one by drawing a few pictures.

He was the best math professor I had at UCLA so far, and I am so glad I took this class.

Professor Rubin is truly the best professor I've ever had and there isn't enough praise in the world to convey how well he adjusted the course for remote learning this quarter. It was his first time teaching 32A, but his lectures were well planned out, clear, and concise. We originally started with a flipped classroom, but after listening to student feedback during the first couple of weeks, he ended up doing traditional full length lectures. He continued uploading pre-lecture videos, which I found really helpful. It was easier to absorb the information in lecture after already having been exposed to the concepts. I really appreciated the way Rubin lectures too. He has the ability to unpack complex theorems and concepts into simpler language and easy to follow examples. I've always hated math because I suck at it, but I think this class was the first time in my life that it's actually made sense so I guess I have a newfound appreciation. We had weekly quizzes and doing the optional homework was helpful for those. The midterm and final exams weren't the easiest, but we were given 24 hours. Honestly, I would've never been able to finish them in the usual allotted times. Overall, Rubin is an 11/10 professor and I would 100% take this class with him again.

I absolutely love professor Rubin. I would take whatever future courses with him.
I took the course during the COVID period, so I don't know if things will be different in-person.

Breakdown of the course:
Worksheets: 20% (graded on completion)
Quizzes: 40% (lowest dropped, and half of the questions from each quiz were directly taken from optional homework problems)
2 Midterms: 10% each (they are 24 hr and if you do your work you will be fine)
Final: 20% (also 24 hr and not too bad)

Professor Rubin used his iPad to give lectures. Since he writes and teaches at the same time I found it very easy to catch up with the pace (and you can basically just copy down what he writes or even just use his notes bc he upload his notes separately after lecture).
Lectures are very well-paced, and he can break down hard concepts into super simple and understandable ones, and that's one of the largest reasons why I like his class so much.
He is very helpful both during lectures and office hours and would take time to answer students' questions during lectures too. He is also very considerate of the current situation so he did like a vibe check before lecture every day and he also made adjustments to the lecture according to student feedback.
I would 11/10 recommend taking any class with him. He's the best math professor I've ever had.

This was Professor Rubin's first time teaching 32A and he made the class very straightforward. His lectures are very clear, he posts recorded videos, and he posts lecture notes. In my opinion, the 2 midterms and the final were all straightforward if you complete all of the practice midterms and homework he posts. Many individuals felt the second midterm was harder but the average was still an 80. Due to COVID, all the midterms and finals were 24hr exams and very do-able. The midterms were 10% of the grade each and the final exam was 20%. The downside to this class was the quizzes. Professor Rubin gave weekly friday quizzes on CCLE which were 40% of the grade. I redid all the homework and worksheet problems as well as recopied my notes to study and found these exams fine. It is just a pain to study every week. Half of the quiz questions are homework questions so, if you complete the homework you automatically will get 50% on the quiz. I would 100% recommend taking Rubin again. Aside from the teaching, he is also a very considerate prof and adjusted the class when students complained about quiz difficulty and lecture format.