He is one of the best professors I have ever had at UCLA. His lectures are clear, he tries to make his lectures engaging (which for some topics it is quite challenging), his exams are all fair, and he is extremely helpful at OH.
I would take him again for any other class.

Benjamin Harrop-Griffiths is a great math professor. During lecture, his explanations of theorems and concepts are succinct, followed by five minutes for us to do a practice problem and then watch him go through the problem. Just by going to lecture and doing the very helpful homeworks (some of which do take a while and I recommend starting them as soon as you can), I felt extremely prepared for Ben's VERY fair exams. When he says that the midterms take one hour, he's telling the truth. Exam problems are similar to homework questions, but sometimes involve a little bit more thinking outside the box.

Apart from math, Ben is a super funny guy and his English accent makes class super engaging. He's extremely helpful at answering homework/lecture questions on his Slack channel, and you can tell he really cares about making the class effective and accommodating.

Harrop-Griffiths is one of if not the best professor I've had so far. Previously I had heard that 32B is one of the hardest lower division math courses, but this professor explains course concepts so clearly that it doesn't feel this way at all. In addition to his clear and well organized lectures, he holds office hours twice a week which I highly recommend you attend. He answers any general or homework questions very thoroughly and clearly (and is also fun to chat with when there are no questions). The homework workload is not too heavy, only about 10-15 problems due every week. The exams are very fair, and everything that we have been tested on he has covered in class. The exam grading system is very fair as well. There are no quizzes for this class, only two 36-hour midterms and one 24-hour final. Overall if you have the chance to take his class I highly highly recommend it!

Professor Harrop-Griffiths is probably the best lecturer I've had to date at UCLA, on-par with the legendary Carey Nachenberg. My friends repeatedly joke that I'm the only person they know who actually enjoyed taking 32B, and I must give credit to him for that. His lectures are clear, engaging, and interesting, and I really think the way he structures his class differently than the other professors made it that much easier to follow and understand.

His first two midterms are easy enough, albeit with a bit of a time crunch; his final, though, is quite tricky. It's really comprehensive and expects you to know everything you learned throughout the quarter, and will take quite a bit of problem solving ability to really nail it. I managed to get a B- on the final, getting most of the points on the problems but completely bombing the last one. Honestly, though, if you pay attention in lecture and do the homework, he does a good job of building up the topics on top of what you've already learned.

All in all, I can't recommend Harrop-Griffiths for 32B highly enough. If you get the chance to have him, take it!

Benjamin was an awesome professor. He was super helpful and very approachable/friendly. His exams are pretty hard, but I think he is an exceptional enough lecturer to offset that. Benjamin is the best math professor I've had in math. Here is a full breakdown of this class with Ben:

1) Benjamin assigns long weekly HW sets. Be sure to start early and go to his office hours to ask for help. Homework is worth a lot in his class, too (I think 25-30 percent).

2) Benjamin's lectures are fantastic. He tries to keep you engaged with Zoom polls, etc. He does everything at a good pace and when asked, he is more than happy to repeat himself. His lectures are related to the HW and the exam and can be used as the primary source to learn. I didn't like the textbook for this class, so I used his lecture notes and was fine. His lecture notes are very well organized, as he writes them out during lecture (on pre-made slides).

3) Benjamin's exams are pretty tough. He doesn't test anything that isn't relevant, but he does put a tough twist on concepts you have already learned. Doing the HW helps, but just because you have done the HW, you are not fully guaranteed to do well on the exams. Fully understanding the concepts will definitely help, however. Surprisingly, the average for the exams weren't that bad. The final had a lower average than the midterms (and it was a harder exam as well), but nothing unreasonable.

Overall, Benjamin is fantastic. He really makes an effort to give you the best experience, and during these COVID times, I surely appreciated that. Best math prof. I've had ever at UCLA. Math 135 is supposed to be one of the easier upper divs, but Benjamin changes that. He makes the class harder than most professors, but if you try your best, you will learn something. I would definitely take another class with him if given the chance, but it would be wise to do so with an easier schedule. Nevertheless, this dude is super cool.

Ben's lectures are pretty clear but his homework is extremely difficult. Be prepared to spend 10+ hours a week working on a handful of problems and going to many office hours. His exams are tricky but easier than the homework. Requires you to be very familiar with precalc concepts. If you can't recall trig identities and function graphs like the back of your hand, I highly recommend brushing up.

For context, this was my first in person quarter at UCLA and the first time I had taken timed, in person exams since COVID first hit. Also for context, I breezed through AP Calculus AB/BC in high school and got an A- in MATH 32A.

Starting with the good, I like Professor Harrop-Griffiths because he is very clear when lecturing and is also very, very kind, considerate, and generous. His lectures are engaging and he is helpful when people ask questions. I also think that with the exception of the second midterm he gave this quarter, his exams are pretty fair.

That being said, this class is not easy by nature. I think having a good professor definitely helps but there is no way to avoid the fact that this class is very dense in material and there is A LOT of information/content in it. One thing that I didn't like was that the examples he gave during lecture were always the easiest versions of the problems. You can bet that you will not be seeing questions as easy as those on the exams or even homework.

Summary of the course: first midterm went fine, got an A-. Second midterm was horrible and got a 32%. I was definitely on the lower end of the scores but based off a GroupMe poll a lot of other people also did just as bad or not much better. In response the professor gave a very encouraging message that basically said he will "disregard" our second midterm score when calculating final grades if we perform better on the final. The final was objectively pretty fair but I still got a 71%. In the end, the professor applied a pretty generous curve I think and I ended up with a B in the class which was a lot better than I could have hoped for. Although I'm pretty sure he doesn't normally curve so I'm not sure if he adjusted people's grades individually or applied an overall curve to the class.

I will say that I think a lot of what happened in this class was my own fault. I never went to lecture in person and only watched recordings and as a result I was consistently always at least a week behind. I never did the homework/worksheets and only copied it to submit for the points. Didn't do any practice problems to study for the exams because I was always frantically cramming in the lectures the night before. For that reason, I am extremely grateful for the professor's generosity with final grades and I honestly believe that an A- or A is attainable in the class as long as you don't slack off like I did. Overall, I would take this class with him again. Even though he accidentally made the second midterm way too hard he definitely accounted for it later on and he wasn't purposely trying to make it difficult so I wouldn't hold that against him.

TL;DR: professor is very generous and considerate and if you stay on top of things then an A-/A should be doable.

Harrop-Griffiths was great. I really couldn't have asked for much better in terms of teaching for this course. Despite the tough online environment and the difficulty of the material, Harrop-Griffiths made it relatively smooth.

Lectures: Very clear slides, good detailed explanations, practice problems to keep you engaged. He posts the lecture recordings as well as his worked out slides.

Homework: Weekly assignments mostly from the textbook. Significantly harder than anything covered in lecture, so it is definitely useful to find people to work through or check answers with.

Midterms: Very fair and based on lectures. Marginally easier than homework problems and I felt well prepared with some limited study.

Final Exam: Harder than the midterms for sure. Don't be lured into a false sense of security by your pre-final grade as the final is much tougher. That being said, it is still somewhat fair given what was covered.

Overall, Harrop-Griffiths clearly cared about our learning and is very easily accessible for questions and clarification. He seems very tech-savvy which also helped with the online format. Take him for this class if you can.

Welcome to Math 135! You probably are here because you heard that 135 is one of the "easier" math classes. Let me just say, Benjamin was like "hold my beer", because this is actually one of the hardest classes I took.
Benjamin is a very clear lecturer. We have a Slack page for our class where we can ask questions, and Professor always goes out of his way to answer every question because he cares about us. He does use slides to lecture, but he doesn't just read from them. There are lots of examples and proofs that he works out with us.
The grading scheme is as follows:
29.5% Homework, 0.5% End of the term evaluation, 20% Midterm 1, 20% Midterm 2, 30% Final Exam
>70% guarantees at least a C-, >80% guarantees at least a B- and so on.

The first few weeks of 135 was very straightfoward. All the content up to midterm 1 was simple. But once we started learning about existence and uniqueness, this class felt more like an analysis class than a differential equations class. Half of the class, we were learning proofs and half of the time we were doing computational work.
His homework is pretty challenging and long, so be sure to start early. Homework is due every Wednesday. Each assignment is about half proofs and half computations. The proof questions were very difficult and the computational problems were long but mostly straightforward. Some of these computational problems are very lengthy and you may have to use lots of pages to solve them! Only about 30% of the homework was graded for correctness, and the rest is graded for completeness.
There were 2 midterms for this class. Midterms 1 and 2 were challenging but still had averages in the mid 80s. However the final exam almost made me cry (average was still somehow a 47/60, how??). To put this into context, if you ever played Pokemon, imagine that Midterm 1 is gym leader Whitney, Midterm 2 is Champion Lance, and the Final Exam is Champion Cynthia from Pokemon Platinum. Because that's how hard they were.
To conclude this, Benjamin cares a lot about his students. His Bitmojis make me smile. His lectures are engaging and I would definitely take another class with him again! I highly recommend him if you want to challenge yourself. You will learn a lot from his class!

Edit:
Forgot to mention that I appreciate him giving us 40 hours for the midterms and for curving my 81.8% to a B.

Professor Harrop-Griffiths is great, highly recommend. He took the best parts of Zoom classes (chat, polls) to augment the in person classes using Slack. With the lectures channel in Slack, students can ask questions through the "chat" without interrupting the entire 200 person class. Polls on Slack were also used for plenty of practice problems during lecture, which were super helpful. It's tempting to zone out during these practice problems. Don't. The professor also posts lecture slides before lectures, and the notes from class are posted afterwards (notes are digitally written on top of the slides during class, which makes it much easier to read than a chalkboard!)

Homework (10%) is graded similar to how it's graded in most of the other lower div classes, as in, partially by completion, partially by correctness. There's a channel for homework questions on Slack. Join the class Slack early in the year so you can ask homework questions to the professor and TA's! The Slack is also where announcements and test info are posted.

Midterms (20% each) can be difficult, so definitely study! Professor Brown posts multiple practice exams. Go through them for real! Set a timer and put away your notes save for a single side of paper of equations (you get to write your own equation sheet for exams!). And then if you have time, go through them again! Solutions are provided; actually go through them fully.

Final (45%) is a large portion of the grade, but the material shouldn't be too unpredictable on average. Many practice exams are provided, so again, these are really helpful. Two sides of one paper of equations is allowed for this one. Very doable if you study the practice exams, previous homework and worksheets, book problems, etc.

Overall, this is a great class, and although it's not easy, it's also not too hard, and the professor is good at teaching and the class is interesting. You'll do great!