I love Professor Greenfield. She is very helpful and patient. I didn't learn well in 131A because it was online.
And going from online and 24 hours open book exams to in-person timed closed book exams was very very challenging. But professor greenfield always explains the problems step by step and she didn't assume things I already know when I go to office hours to ask her questions. Overall, this class is very hard, but she gives a very fair final exam. As long as you try hard to understand her class notes and Homework you should be fine.

I'm a student who majors in math. I love maths but I always felt lost in this class. She didn't explain well during the class and even sometimes confused herself when proving the theorem.
The workload is medium and the exams are fair. However, it seems that she didn't curve the score at all even if the final average is less than 50%. Even though you achieved 60+ in the final, which is much higher than the average, you still get a C or C+. Even though you got 80+ and you were in the top 3 of the class, you may only achieve B+.
Anyway, if you are confident to achieve nice scores in the final, you are OK to take this course. Only consider your own score instead of expecting her to curve.

DO NOT TAKE THIS AND I CAN NOT STRESS THIS ENOUGH, DO NOT TAKE THIS CLASS WITH THIS PROFESSOR.
Although she seems like she would be a nice person, she is not a great professor. Lectures are not as helpful, the TA does a way better job of explaining the material.
practice midterms are nothing like the actual midterm. Class Average was a 68% for our first midterm. The homework is A LOT. Trust me there are way better professors out there. I am not trying to bash on her but honestly do not take Math 31 with her. It is not worth it.
Thank you for coming to my TED TALK.

Highly recommend! Professor Rachel is amazing. She is very articulate which is so important for this class! I'm not a big fan of analysis and pretty average at it honestly, but professor Greenfeld made the class interesting and fun to do. The exams were very fair.

I took this class having taken calculus during junior year in high school, but I didn't touch algebra or calculus at all in between. Overall, I didn't dislike Professor Greenfeld as much as other people, but I wouldn't take a class with her again. The averages for both midterms were pretty abysmal, so there was clearly something wrong with how concepts were being taught. Often, during lectures, I needed to repeat what had just been said to make sure I understood it myself since it wasn't always clear. Professor Greenfeld seemed like she knew the concepts, but it was difficult for her to articulate her knowledge to the class. There were also questions on the midterms which didn't reflect what was in the homework and lectures. While I don't recommend taking 31A with Greenfeld, if she ends up as your professor, just know that you'll probably have to do practice problems and/or read the textbook to give yourself a better grasp of the concepts.

I wanted to refrain from posting my review until I received my final grade. Let me tell you that I am beyond surprised that I have a B-. I am appalled to think about how giant the curve had to be. I did not do well on either midterm or the final. I had only taken precalculus in high school and was nowhere near prepared for this class.

I will say this, often you could tell that Rachel was passionate about what she was teaching. Unfortunately, she falls into the elite class of academics that are knowledgeable yet do not know how to explain concepts clearly. This is not a great quality for a math professor, especially not one that teaches a foundational calculus course.

She was vague when she would answer questions, skirting around answering directly. We were wary that maybe she did not know what she was talking about, often reading off of a piece of paper to write on the board. Many times she would make computational errors or write down incorrect equations, but who doesn't make mistakes here and there.

It is true that the exams were nothing like the homework or problems given in the lecture. I can only assume she combined many concepts into the limited problems in the test. Surely this would be fine if we were adequately prepared; we were not. A lot of the exam questions were theoretical.

The homework itself was not time-consuming or strenuous, completely manageable. Unfortunately, it was not helpful.

I am not naive enough to know that it was possible to do well in this class. There were students that received As. However, it is frustrating to have a professor that is not going to be helpful in your learning. If you want to succeed in this class you need some sort of combination of prior knowledge of calculus, a tutor, help from the TA, and help from online sources.

As for Rachel herself, she is a very sweet person. However, I think she was personally affected by some of the comments we expressed during our reviews, even stating that she felt disrespected. Hopefully, if you take this class in future quarters, she will have had reflected on her teaching style and abilities.

I personally would not take this class unless you know you have a prior foundation in calculus and will do well.

I love Professor Greenfeld very much. She is very patient and helpful during office hours and gives very engaging lectures. If you go to her office hours, you can not only learn how to solve a particular mathematical problem but also learn mathematical methods and general study advice from her, which are extremely helpful for a math major in the long run. She explains things very well in lectures and raises my greater interest in analysis. I will genuinely miss being in her class in the future.

Highly recommend taking this class with her. Fair exams and good homework problems.

As a double major senior student in ECE and Applied math department, I have took more than 30 upper div classes in UCLA and I never felt this lost in any of my coding, engineering or math classes. The professor doesn't know what she's talking about and I noticed she got all her notes and hw set from Professor Killip's fall quarter. Basically her lectures were the worst lectures I have attended (so I stopped going to live lectures after week 3 and read the book instead) and the test are ridiculously long, time consuming, and hard. My advise as a UCLA Alumni : AVOID HER AT ALL COST EVEN IF SHES TEACHING BASIC ALGEBRA

The professor is not that helpful and she always ignored the emails I sent to her. Her lectures are really hard to follow because of her voice volume and explanation. She can't answer the question clearly in the Q&A session. I don't know why she is still able to teach this class.