1) Lectures are nothing like the HW which is great because directions are also very vague! She often changed what she asked you to do on the hw half way through the week. Expect to spend HOURS on the homework just trying to figure out what you're even supposed to do, then get a bad grade on it because you didn't do it right (and yes, I asked for clarity and she just paraphrased the same instructions given earlier). Sometimes it seemed like she didn't even know what she was assigning/talking about.
2) Tests were a joke which makes me super confused about the hw difficulty and harshness on grading
3) Final is is a group project with a VERY open ended question & she urges you to interpret it as you want. I quote "There are no wrong ways to model if you provide the proper justifications" yet she docks points because she doesn't like your model. When our group met with her to go over what we had so far, she said everything was looking great, then dropped all of us a full letter grade because of the grade we ended up recieving.

Overall-- this class already sucks because of how all-over-the-place it feels in terms of content, but she makes it worse because directions are never consistent and grading is extremely harsh on content we were never taught in lecture. Sorry that you'll probably have to take it with her anyways because there are no other options! Enjoy!

Avoid when possible

31B NOT Math 42 because whoever runs bruinwalk seems to have graduated long ago and no longer updates stuff.
Let me preface this by saying that pretty much everyone I spoke to hated this class.
That being said, I didn't hate it. I thought that the p sets were engaging and I actually enjoyed solving the problems (which was nice for a change). Lectures were interesting and substantive. The TAs were very helpful and it was very interactive. Unfortunately, most of the kids taking this class are bus econ or bio majors, and I can understand how it would be very hard for them. Also, maybe I feel more positive solely because I did well.

Unfortunately, Dr. Johnson has a bad case of a pretty nasally voice, which doesn't speak much about her character, but it did make it kind of hard to listen. She was also very blunt, which was off putting.
This was definitely a hard and unclear class, but interesting, so take it at your own discretion.

MATH 31B REVIEW!
(not on Bruinwalk but this class was so bad that I felt like I had to review, didn't take math 42).

I would try to find nice things to say about a professor even when I detest their class but Johnson's rude and condescending nature makes that difficult.
- Lectures are pointless (literally)
- Homeworks are some of the longest I've ever had at UCLA (over 10 hours/week, pretty much pointless time loss)
- Her voice is very difficult to listen to for 50 minutes (that might sound like an insult, but it's not, it's genuinely something you should take into account before taking this class, her voice hurts)
- She's not very willing to give help if you approach her, not that she's very approachable in the first place.
- Midterm scores were EXTREMELY low and most were panicking coming out of the final (she seemed to think that her class just sucked since she obviously can't be given ANY responsibility for her students not being taught well)

Her class is basically Professor Arant's class copy and pasted, so you're better off taking his class. The one saving grace about this class is that the notes are very nice, which makes self-teaching the material easier, but even then they're often posted too late to be useful on the homework and sometimes even after the midterm that they were supposed to be on.

Other notes: discussion attendance is mandatory, tests were difficult this.

Didn't enjoy taking this class at all. Professor Johnson was unclear in her lectures (took bits and pieces from the textbook, didn't explain anything clearly) and her grading on the quizzes/ homework assignments was very harsh.

Sometimes the homework assignments took upwards of 10-15 hours to complete. I will say that she wasn't very good at teaching Math 42 because she had no idea what she was even teaching to begin with. Overall, I wouldn't recommend taking this class with Prof. Johnson. If you don't have a choice, I'd suggest learning everything from the textbook (showing up to lectures isn't worth it).

I’m sorry for whoever has to take this class. Pro tip, wear protection before you let this class fuck you up.