Assigns unreasonably long problem sets and is not a clear lecturer at all. I ended up more confused from his lectures as opposed to reading the textbook. His tests are fair though as his review sessions prepare you well.

Not really sure what to say other than to avoid. He’s never really clear in his instruction and his lectures are sometime outright incorrect. Everyone will get 1-2 specific things wrong on an exam and Koffi will complain but not clarify what would’ve been correct. His homework starts off fine but as the weeks go on they get progressively longer. The last homework was 43 parts long. He posts practice exams but not solutions. There’s maybe only really 10-15 minutes of actual lecturing (which is wrong) and the rest are rants (including “fake” reviews lol) or “life” advice. Also he “forgot” to let us know that we could use cheat sheets on the first two midterms. At least he remembered for the final. But then he banned calculators because he believes you can put ChatGPT on them (which is only sort of true and more hassle than it’s worth). TLDR is don’t take Koffi if you’re interested in Math and value your time.

Terrible Professor. Avoid him if you actually want to learn, otherwise the tests are easy so it shouldn't be too hard to get a good grade. His homeworks are designed to take you at least 8 hours to complete per week and they don't teach you a single thing. They are completely useless for exam prep, just do the practice exams. All in all, I would avoid this man like the plague if I was actually interested in Numerical Analysis and was looking forward to learning the subject.

Pros:
- Very easy exams (almost the exact same format as previous exams, which makes them easy to study for)
- Funny, no B.S. personality that becomes endearing once you get to know him
- Cares about his students and will only put material he covers in lectures on his exams

Cons:
- Very long, weekly problem sets (time-consuming but they are effective in raising your proficiency)
- Accent takes effort to get used to
- "Flowing script" handwriting makes it difficult to read what he's writing on the chalkboard. If he's writing on his iPad for Zoom, expect to be able to read like 50% of his stuff lmao.
- Frustrating to work with over email; you need to visit him in his office to get stuff done (more in the notes section below)
- His method for teaching can often be unclear or unintuitive (more in the notes section below)

Notes:
- I've taken multivariable calculus before in high school but needed to take it again in college because I took it at high school and didn't get college credit for the course. So, I was okay with Koffi's sometimes-unclear lectures since they were kind of like a puzzle for me to work through his logic/reasoning to re-learn material I had already learned before. However, this could become quite frustrating if it's your first time learning, so keep that in mind.
- I was one of several students who received an incorrect grade as my final grade, and the process to get it fixed was extremely stressful. It ultimately took about a month AFTER winter break (he told us specifically not to contact him over the break), an email chain in which he left me on delivered or replied very passive-agressively half the time, AND an in-person visit before everything got fixed. While I would've considered taking his class again before, that experience has lowered his rating from me by a solid star and I do not want to deal with that again.
- If you read Koffi's Bruinwalk review, you'll notice they are split 50-50 between people who love him and people who hate him. I admit I am among those who like him better. This is highly dependent on how open you are to adjusting to Koffi's accent and personality as well as teaching style. In other words, if you take his class with rigid expectations on what a math lecture should be like, you might be disappointed. But if you are looking to (re)learn multivariable calculus with an open mind, you might enjoy taking Koffi's class. I certainly did (until the incorrect final grade fiasco).
- Also the Bruinwalk reviews that say his final was uncharacteristically difficult compared to his midterms are not true from my experience. Very similar, if not identical format; just longer.

Koffi's an approachable professor who explains most concepts well and always pauses to take questions. The midterms were both fair but the final was quite harder than both of them. The weekly homework is absurd. Sometimes, there can be as many as 40 problems in a weekly HW assignment. Thirteen HW assignments for the whole quarter. Make sure to attend the review sessions and do the practice tests he posts to Canvas prior to each midterm and ESPECIALLY before the final.

If you want a good grade, take him. Both the midterms and final were fairly easy. You would get similar or even the same questions as in previous years, and I recommend watching the review session videos. Quizzes are mostly conceptual, but he lets you keep the highest grade. To be honest, the homework is kind of useless. There are about 20 questions from the textbook each week.

Generally, if you are passionate about math and want to learn something from it, I wouldn’t really recommend him. But if you just need a good grade, then take him. He’s a nice and funny person as well.

Koffi is a passionate and helpful professor who wants to see his students succeed. His lectures are difficult to understand and he will be behind the class schedule for the whole quarter. You will probably need to rely heavily on your textbook and other outside resources to learn the class material and keep up with the schedule. However, Koffis's exams are fairly easy. You will be fine if you go to his review sessions. He loves to tell jokes, so laugh at them if you want to succeed.

I only got through this class because of the textbooks and my TA. (Huge shoutout to my TA for hosting extra office hours and responding to emails very fast.)
We were two weeks behind 2.5 weeks into the quarter, and I often felt more confused after each lecture than I did after reading the textbook/having my TA teach the content beforehand. We did cover all the content, but only by rushing the hardest concepts at the end.
The homework is…hard, and asking the professor about it often confused me more. Tests were not hard because they were very similar to his review sessions and practice tests, but an “easy” A based on tests is not worth it considering how bad the rest of the class was.
It was also very strange because it felt like the professor was beefing with the TAs for the second half of the quarter and (at least according to my TA) went so far as to tell them that they couldn't teach new content or reteach his content during the discussions to basically render them ineffective in the last week. Very strange dynamic. Not sure what was up there.

Koffi gets a lot of hate for no reason. If you study for this class even a bit, his tests are basically the same as the review sessions and old tests. yes, the hw can be tedious but it's not difficult to get a good grade if you check it with one other midterm. His only issue is pacing, but he got through all the material this quarter and I felt very prepared going into each midterm and final. A lot of this class is studying what is on the test instead of all of the content. He explains things fairly well if you ask him directly and he's not hard to understand contrary to what other people say. If you put in a bit of effort, you will get an A in this class.

I could not understand him or read his handwriting. I recommend reading the textbook instead of attending class.