professor
Bin Guo

Jan 2018

Honestly, I didn't try other Calc II sections in order to compare Bin Guo to other instructors, but I believe he is pretty good at teaching. His lectures are well structured and, while some might say it is terrible that he uses textbook problems, it helped a lot when I couldn't make it to class. During lectures, he would always give a more detailed explanation, so I was never bored. I think he goes on a fair pace, never too slow but also not that fast. His tests were similar to the practice problems he posted and not very difficult. He's an easy grader, because he bases the marks on your explanation rather than on your answer.

May 2017

I was very impressed by how Bin Guo manages to smile and talk at the same time. However... His lectures bear little difference from an audiobook of Rudin. He nearly always gives the same exposition and examples, and when Rudin reads "Remark: [...]" Bin Guo will say, "Let me make a remark..." I also noticed that many people took pictures of the board instead of taking notes, which meant that either he was going too fast or he was not terribly interesting. Re: the latter, I will grant that verifying that calculus works is not the most exciting subject matter in the world. He is also not very helpful outside of class. I once asked him to explain why my proof on the midterm was incorrect, because all he wrote was "?", and all he had to say was, "This part of your proof is OK. The rest is bad and not good

Nov 2016

I had Professor Guo for Analysis II in Fall 2016 - I'm writing this now since I realized he didn't have any reviews yet on culpa. I believe it was the first semester he taught at Columbia (he got his Ph.D. just in 2015) and he did a pretty decent job considering that. I've heard that after his first semester of teaching he made tweaks to his exam difficulty and I've heard only good things about his classes since. Lectures: - Professor Guo is very clear and helpful during lectures. During class he would pretty much just go through the content in Rudin (with some added intuition here or there) and if you ever had a question about anything he would give a good answer. Exams: - The exams were very very difficult. I was in a class of 15 or so people who were all math/CS majors and the average on the midterm was a 26/60. The format was 6 problems, 1 from the homework and 5 original problems which required a lot of ingenuity to solve -- they weren't just simple applications of the material. Of course, this means that people who knew the material but didn't have the intuition for the tricks needed to solve the exam problems ended up doing poorly, which is understandably never a good feeling. The final was 10 problems which were all original.