Prof. Ronchetti's lectures were always pretty clear and easy to follow, and he always answered any question that anyone had. Half of the problems on the midterms and final were straight from the worksheets given out in discussion. The LAs were super helpful, though my particular TA (Abigail) wasn't the best at explaining things; I'm sure she's very smart and understands the material herself, but she was not great at explaining, and if I had any questions I asked the LAs instead. The homework is manageable and not very difficult. A very solid class overall in my opinion.

The highlight of this professor was his office hours. He had some of the best office hours of any professor I've ever had. He was very helpful without just handing students the answers to the homework. BUT he did assign a LOT of homework. Overall I really enjoyed this class and I think mostly it was because the professor was so cool.

Professor provides free online textbooks. He's passionate, patient, and very smart. He actually helped revitalize the little interest I had in math. Lectures are Bruincasted and lecture attendance is not required, but I highly recommend it. Concepts are covered beyond those explored in high school precalculus. He assigns weekly assignments due before lecture on Friday, and assignments are useful but can be tedious and long. Exams are also fairly difficult, and require a fair amount of studying.

This was my most work-intensive class of the quarter, but Ronchetti is a wonderful professor and I still recommend the class. I feel like I genuinely learned things in this class, and Ronchetti is honestly pretty adorable sometimes with how much he loves math. He's also apparently a chess world champion, so that's cool too.

Pros:
His lectures are VERY clear, despite him talking a bit fast. But if you didn't catch it or didn't make to any of his lectures, don't worry~. His lectures will be Bruincasted as videos, so you can go back and watch previous lectures.
His office hours are EXTREMELY helpful for answering homework or practice questions (or if you just want to talk about anything and see his down-to-Earth, slightly sassy personality)
His homework questions are uniquely designed to challenge, but not become impossible, his students.

Cons:
His tests are EXTREMELY difficult. First midterm avg was 31/50, Second midterm 34/50.
The TA (I had Matt) wasn't of much help when we would go to discussions, as the material would be covered a lot quicker than the pace of the lecture.

Overall, this is a tough class with concepts that are more proof-based rather than computational. I would try looking for other professors for the same class first, although I do really like his personality and lecture style.

I took 31B with this professor and he spent WAY too much time on sequences and series-- way more than other professors-- which is much harder than the integration stuff we did later. We ended up having to squeeze in all of the integration at the end making that also harder than it had to be. The class had a pretty generous curve, but I still had to study a lot for every test and go to office hours frequently. I also took a class in high school with similar content which is likely a large reason why I ended up with an A. He is not super nice when someone asks a question that he thinks is simple and his handwriting is terrible. Generally I think the subject matter of 31B is just difficult and boring and he is a new professor, so it was kind of a perfect recipe for a confusing quarter of math.

I was a first-year pure math major when I took 33AH with Ronchetti in the Winter of 2019. It was quite a pleasure to attend lectures; they were clear, concise, and straight to the point. When he would display theorems, he would immediately give telling examples to make sure the class would understand how the theorem applied. As well, he stopped frequently to ask for questions and would answer all questions with astute clarity. In office hours, he was kind and pretty damn patient, too. Again, he explained concepts very clearly and offered supplemental intuition for concepts without giving away the answer.

Now, his homework assignments were BRUTAL. I expected difficulty, but not to the extent he offered. We had between 8-16 problems per week, with maybe 1/3 of the problems being proof problems. Ronchetti is also very strict on homework submission, with no late homework being accepted (although one homework is dropped of the 9 we had). His exams were definitely easier, and were doable if you did all the homework with additional textbook studying on top of that.

I am a big fan of proofs, and this class definitely helped me develop stronger mathematical maturity in that regard. The tough homework assignments paid off, so if you're serious about math, take this class. You'll have to work for your grade (long hours of self-studying from the textbook), but it was definitely worth it for me.

Okay so this professor is genuinely a good guy, but I wouldn't recommend his class under any circumstance. There's homework every week, and a lot of it, and there's a quiz every 2 days. The midterms and final were hard as hell. I think I got a 29 on my final. I also rarely turned in the homework. This was my first class as a freshman and it made me change my entire major and really consider dropping out of school. And this wasn't just me, a lot of the kids talked about it too. My overall grade was a C- (i was shocked) but it kind of shows you that everyone in the class did so bad that his curve had to be extreme. Just save yourself the energy, pick a different professor.

I took 31B with Ronchetti in Winter 2018. Be prepared. His class is NOT easy. If you do your research on him, you will find that he is a chess prodigy and mathematician, so his exams and his class reflect this. Many of his exam questions are concept based and often times required a lot of creativity and fancy algebra. However, he is EXTREMELY helpful. He is always willing to answer questions in and out of class. At times, I think he was too generous with the amount of questions he answered in class-- often times 15 minutes of just answering questions. Moreover, he held two hour long office hours twice each week. He is incredibly patient and friendly. A lot of students gave him a really hard time, but that's probably due to the stress this class induced. Would I recommend him as a professor? If you're creative and can absorb concepts easily.

Professor Ronchetti definitely knows his math and expects you to know it too. I took his 31B lecture over the winter and he directed the class in an order completely opposite to any other professor. He focussed WAY too much on sequences and series and that made the class extremely challenging. The practice midterms and finals he uploads prior to the tests are very difficult and he does not upload the solutions. However, he does go over almost all the problems in the OHs and classes leading up to the test. The only reason I could even barely keep up was that I took a similar class in high school.

I would recommend him only if you really love the subject and can grasp challenging concepts easily.

THIS IS A REVIEW FOR MATH 33A: First off this man is an absolute unit. He's pretty good at chess (he has a wikipedia page) and knows his math. I was reading some of the other reviews for him and noticed a lot of hate because he was "too hard" or they studied "forty hours a week just to fail every test". Ronchetti is not an easy professor and Linear with him pushed me. The weekly problem sets were pretty brutal and took topics discussed in class and in the class to the next dimension (pun intended). Because of that, I LEARNED! I talk to my friends who have had different 33A professors and their grasp of the material just isn't the same. If math is just something to get through, don't take him, I get it. He moves quickly and expects a lot out of his students. His tests are fair though and he stayed after class everyday to talk with students as well as being helpful in office hours. He is teaching 115A in the spring of 2019 and my friend enjoyed his class so much that he is taking it just to have him as a professor. He convinced some of our other friends to do the same. I would also take the class but it doesn't fit in my schedule. :(.

TLDR; Hard professor with homework that will push you to really understand the material. Highly recommended to anyone looking to understand the fundamentals at a deep level or expecting to use math in the future. You won't regret it.