David teaches in a very natural manner that makes it easy to approach the material.

Instead of copying a bunch of formulas onto the board, he derives formulas to solve general equations and shows you how other questions are really just variations of a few key equations.

He is very welcoming of questions during class. He has interesting anecdotes and a consistently upbeat demeanor.

Math 31B

*If you're looking at David to teach you math your first quarter at ucla. DONT. I made that mistake*

David is a nice enough guy and he really does care about his students. I would NOT venture to say he is a great professor, though. His lectures are unorganized and he does not manage his class time well; i.e. he says he has 3 topics planned for the day but only gets through one. This sucks when the exams come up and he crams a bunch of topics into 2 days.
That being said, his class is bearable. He gives out practice midterms which are identical to the actual midterms. However, you have to do extra problems outside class to do well on the final.

He is a good guy who cares about the students but can't teach well the material he wants them to learn. No real structure to his lectures or class. Not due to the lack of effort though. You either like his style or you don't.

I had Weisbart for two math classes. The negative aspect is that his lectures are not helpful and often confusing, especially for 3C. His questions on his exams are often poorly worded and thus can be interpreted in multiple ways, which is really bad for 3C, in which the word choice is everything!!! However, the positive side is that he really cares about his students and wants them to succeed. I would recommend taking him, but be prepared for some frustration along the way.

David is Boss.

David is one the nicest, most genuine professors I could ever imagine existing. He took his PhD at UCLA in 2005 and has been teaching here since then. I hope he stays at UCLA forever, because his teaching style and interaction with other professors, TAs, and students make him one of the most approachable, motivating, and caring professors on campus.

His lectures are ALWAYS engaging. I'm a math major, and have never taken a class in the department whose material I didn't find intersting on some level, but there are definitely professors that just make you discouraged or apathetic when they drag on forever, lecture exactly out of the book, or have no life in them whatsoever and no ability to interact with students other than answering questions like a computer. David is extremely human, and is always thinking as hard as he can to explain or present his material in the most engaging and approachable way.

Also, this guy is freaking nuts. He just finished writing a huge analysis book he's using to teach 131A in S11, and he self-printed the book and sold it out of his office for $30. Needless to say, the book is extremely unique and really a wonderful intro to the subject. He's writing vol.II and another book on probability as you read this.

Also, he's familiar with a lot of different subjects. He studied physics for his undergrad, works in analysis, probability, quantum theory, and topology.

This guy should be in charge on the math department.

Let's say this, if you wanna learn something and have easy tests, go ahead and take this professor. The point is that never go to his office hour because you never have a chance to ask a question. And I kinda like his 100% final because the final is easy and I got an A because of that.

i took him for summer session, and his lectures were very unorganized. he seems like he knows what he's talking about, but has difficulty helping students understand WHAT HE'S TALKING ABOUT. his class was easy only because the class itself was an easy class. he's a nice guy, but has very unorganized lecture.

David is a great math professor. He does not limit us to problem solving yet encourages us to think outside of box. His classes involve stories and history of the course materials which are really interesting. He's really concerned about students and made problem set session for us from week 6 and on. He's one of the best math professors that I have had at UCLA.

I don't recommend Professor Weisbart for Math 3C. Perhaps he is more effective for the thirty series. I, and my floor mates who had him for Fall '08, thought he was a horrible professor. During lecture, he wastes a lot of time proving theorems that already have proofs in the textbook. He also likes to talk about his research and things that have nothing to do with what he is supposed to be teaching. Even though he prepares his own notes for lectures, he is often confused and has to think about a problem for a while after he realizes his solution is incorrect. Probability is a rather abstract concept compared to algebra and calculus, and his explanations rarely clear up anything.

He is nice, though. He provides a number of practice midterms and finals that are quite similar to the actual exams. He welcomes everyone to his office hours, but he is as effective, or rather ineffective, during them as he is during lecture. I like the fact that he has two grading systems: the conventional one with homework and exams worth different percentages of your grade, and one where your grade is what you get on the final. The only reason I earned an A- in his class is because I studied A LOT for his final with my floor mates.

The bottom line: Be prepared to teach yourself, or study with friends. That helped me a great deal. Hopefully, you'll have an effective TA. You'll have to rely on him/her, too.