I can tell that the instructor tries to do a good job, but I feel like most lectures were just not worth attending. He often goes off on tangents that are irrelevant and difficult to understand (for example explaining proofs that are not needed in the actual exam or for understanding), invariably making class harder than it is supposed to be. I knew a lot of the first half of class beforehand but attending class just confused me even further; the second part, I had to self-study the entire thing. The professor is available outside class though, I would say.

I felt like his teaching style was very fast and he did not thoroughly go through each aspect of the course. His way of teaching a topic was also much more complicated than the actual topic was, which made it confusing to understand the topic. His midterms reflected the practice midterms pretty closely, which were slightly more difficult and complicated.

I enjoyed Xiong a lot more than my past 2 math teachers here. There were two different grading schemes and he used whichever one was higher for your grade. The first one was 15% homework, 20% each midterm, and 45% final. The second one was 15% homework, 35% highest midterm, 55% final. There were 7 homework assignments and he gave us some of the problems for the homework after the lectures so we could start early and practice right after we received the material. The assignments were manageable and usually 8 problems maximum. The first midterm was almost exactly like the practice midterm and pretty easy and the second was similar to the practice but harder with a class average of 66%. The final was pretty difficult and consisted of true/false and free responses. I liked how he did review sessions in class before the exams instead of still giving us new material the lecture before the exam. And the lectures were recorded which was a plus. Overall I thought this class was manageable and would recommend Xiong over another 31B teacher. And if you have the option try for Cecelia as a TA! Literally a human calculator the best TA I've ever had.

Lectures are relatable to the content. All of his midterm/final questions can be traced back to concepts discussed in the HW and lectures. His midterms are similar to the practice midterms, but the 2nd midterm is harder than the first one. You can drop your lowest midterm, it will just add on more weight to the final. The final was tough, but doable if you prepare for it well. He curves the class up at the end. Xiong is the best you're gonna get here for at UCLA for Math 31B so I would recommend taking him.

Honestly, you are just teaching yourself everything. The professor reads and explains very poorly actually he does not explain. The exams he makes are very complicated and include things that he does not even go over, which is very frustrating. When the class does badly, he writes a message to the students about how badly we did. I took him last quarter too for 31 AL and he said "I went through this and suffered now it is your time to suffer" just to show that he does not care.

Haoren Xiong is a great professor, while his lectures may be a bit dry, it's more so the content rather than his lecture style. His lecture slides are incredibly detailed, comprehensive, and useful when doing homework. In addition, he spent his virtual office hours helping students with homework problems and basically walked us through the problems step by step. While the final was a step above in difficulty compared to the midterms, he also gave us an overview ahead of time of what the format would be and instructed us on specific topics to focus on when studying. His lack of experience can cause some hiccups when it comes to his overall administration of the class, but he does his best to be as accessible and friendly as possible.

Professor Xiong focuses so much on proofs that he doesn't do application problems which was difficult when it came to homework and exams. He's a super nice guy and new professor so he is pretty accommodating, but the reason I did well in the class is probably more credited to taking Calc BC in high school (it's literally the same class). TA's are also super helpful.

haoren was traumatizing. period. He picks THE HARDEST QUESTIONS from the textbook for each homework and his tests were tough af.

Chill funny guy. Massive advantage to the people who took AP Calc BC, but that's true for any 31B professor. From what I have heard, his class covers easier problems than other 31B professors and his midterm/final exam averages were much higher as well. Overall his teaching style was solid, going over the concept in the start of lecture and then doing a couple problems. Workload is very light, only like 5 or so problems a week, but if you're struggling with the content or didn't take Calc BC doing a few more would def help. His practice midterms helped tremendously for the midterms, and both were very fair. The final was difficult, but still fair. Overall solid, would take again, probably better than your other options.

I personally loved Haoren. For someone who doesn't like math, I learned a lot and was able to make sense of so much more than I thought. The lectures are good and understandable and the recordings are great too (if you dont wanna go to class). Plus, workload is great. He gives a few questions after every lecture and that accumulates to a weekly homework. And, he accommodates for mid term weeks so you have more time to finish the homework. The discussions are pretty helpful IF you decide to go. You solve a worksheet in each discussion (so twice a week) and they make up 5% of your grade. BUT discussion is also NOT COMPULSORY till the time you just submit the worksheet the same night at 11:59pm. I would 100% recommend taking him for this class and I am 100% looking forward to taking his 31b class next quarter too.