Run while you can. That is all I have to say.

Professor Huang is a really nice person, yet she really needs to improve her lecture skills. The lectures consist of mostly her reading off lecture notes and it gets confusing sometimes when it comes to some difficult concepts. Math 61 is not a hard class and taking it with Huang is tolerable since she is really helpful in her office hour, yet I would not recommend her to anyone who would take this class since I feel like personally I did not learn as much as I intended to in this class.

Professor Huang is very nice and she's always patient to answer questions. However, although she is always trying to explain materials better, her lectures are often unclear and hard to understand. It is more efficient to go over her lecture notes. Exams are not hard as long as you do all the hw and review before exams.

Unfortunately, this class is going to be mostly self taught if you take it with Huang. The material itself isn't very hard though, so you can mostly get by on just reading the lecture notes she posts. She does weekly quizzes, one midterm, and a final. The quizzes are a mixed bag, with some being difficult, and some being a joke. The midterm was pretty hard and tough to finish on time, but the final was extremely easy.
Overall, a pretty easy math class that has a really light workload. All you really have to do is understand material from lecture notes, do the three required homework problems each week and understand them, and that's about it. Side note however, the grading is somewhat annoying, and she doesn't really give solutions to anything.

Professor Huang is definitely not the best lecturer although you can tell she is definitely trying to improve. She was willing to take into consideration how we wanted to go through the notes and learn the material and teach accordingly. The material for this class is, in general, pretty straightforward so you shouldn't have too bad of a time teaching yourself when the lectures are not very clear. The homework were pretty light and didn't take too much time - usually there were about 4 questions. We had weekly quizzes on Mondays as well which were generally based on the homework due that week on Friday so if you did the homework before the quizzes were pretty manageable. The midterm was a little tough to finish in the time span given, but was not given much weight in your grade (I think 20%). The final was MUCH easier and definitely doable if you understood the homework.

Professor Longxiu does her best, but her lectures can be confusing at times. Her lecture notes are taken directly from the textbook, so I would often go there for clearer explanations. But overall, the class is pretty standard, and not too difficult. There is homework (3 questions) and a quiz (1 question) every week, with a midterm and final. The midterm was relatively difficult, but the final had a much longer time limit, and it wasn't hard to get a good grade.

The lectures were kind of boring and the explanations were unclear, but her office hours were helpful and exams and homework are very fair and helpful. Therefore although you might not enjoy the class I still recommend it.

Overall, a pretty good experience. My favorite logistical thing about this class is that homework, midterm and final was graded SUPER fast (about a 24-72 hour return time). The material itself was pretty interesting (if you like numerical methods) but nothing special. We covered ODEs and some linear algebra. This is definitely one of those courses where you just do the homework (instead of really watching lectures) and learn as you go in my opinion. I never talked to the TA before but he seems like a swell dude (graded homework really fast). Same for the prof. If you worked with MATLAB before, this course will be even easier because there was at least one programming assignment on every homework. However, it isn't necessary, i rewrote most of the programs on Python and used those results and it was fine. The grading of this class is really lenient, 49% homework, 1% for teaching eval, 20% midterm and 30% final. Again, for me the homework was essentially a free 100% and the exams were pretty similar to the homework. The final was a bit harder than the midterm because there were True False questions that were hard to find in lecture notes but still doable. The average on the midterm was a 94% and we didn't get to see what mistakes we made on the final, though I got a 90%. Overall, a fairly easy course but definitely a bit harder than 151A

Professor Huang was a terrible teacher. She could barely speak english, wrote in a tiny font in a 200 person lecture hall, and was not able to understand and respond to questions. I went to every lecture in spite of her terrible teaching, but it rarely got better. I spent this entire course relying completely on myself, my TA, and my peers. Her lectures SLIGHTLY improved when she switched from slideshows to writing everything on the board, but not enough to be actually effective. Her tests were also extremely inconsistent.

This class should be fairly easy. But when you take it with Prof Huang, it's not. Lectures were usually empty, and for good reason. Prof Huang taught the syllabus as if she read it from the textbook - each topic was explained only in the most mathematical way possible with lots of derivations that weren't necessary. There was no attempt to explain topics in basic English, only the language of math was used.
She seems like a nice individual but that doesn't really help when it comes to learning. One plus of this class was the generous grading scheme which allowed you to completely drop the midterm for the final. I honestly only got the grade I did because of prior knowledge of the topics from high school and doing lots of practice questions from the textbook.
Long story short, if you are a math nerd through and through you'll love this class. But if you're like me who's just taking it because it's a prerequisite, you're better off finding another professor.