Horrible lectures. Horrible. Terrible. Youtube and textbook are how you learn. He posts midterm and final review sessions that are VERY similar to the actual exams, so study and know those well. If you do that, you'll probably do well in this class, and that's that. Homework sucks. It really sucks. 20 problems a week on average, consisting of challenge problems that take forever to figure out. To counteract this, all HW's are due after finals week if you get behind. Overall, easy but not fun or rewarding, and I might be screwed for 32B because of him.

I had the pleasure to take Prof. Koffi's class -- a very nice and bright Professor!

I enrolled into Koffi's class seeing all the positive reviews on Bruinwalk. I only went to one lecture the whole quarter, not only because I couldn't understand what he was saying due to his accent (which isn't his fault), but also his handwriting from his notes are impossible to decipher. That said, I only relied on Professor Leonard on Youtube, even if his lectures took forever to watch. I would occasionally join his zoom lectures to see what he was covering, yet majority of the time he would go on random tangents every time, which is why he was so behind on content. He would call all his students lazy, scoff at us for being young & not knowing anything. I would never take Koffi's class again for three main reasons. The first being that for both midterm 2 and the final, many of the questions covered material he crammed literally 2-3 days before the exam. It honestly is a first having a professor holding lecture during finals week. To be honest, I walked into the final thinking I would have to retake the class because it was so incredibly stressful. The second reason I would never take him is the weekly homework assignments that had 20-40 questions. I usually like homework in math classes, as it's super beneficial for practice. However, he gives questions IMPOSSIBLE to figure out on your own. While others have said it took them 2-5 hours, it took me so much longer. While he extends them to the end of the quarter, I ended up turning them all in at the end because some questions I just couldn't do. Just so you know, he assigned HW #9 on Thursday of Wk 10 and assigned HW #10 on Saturday of Wk 10 (after the quarter ended, lol). During spring break, I spent so much time finishing up my homework. The main reason I would never take him again is that he's just not a great lecturer. I spent so much time out of class teaching myself or learning through YouTube, which often led me to be behind on other classes. He reads off his notes, which are illegible, and often he skips important steps to learn the material. If you have no choice but to take him, I highly recommend not going to class as it's a waste of time and teach yourself. The textbook is great, but Professor Leonard is even better.