Note: I took 115A with him

Schaeffer is a great lecturer, and a really effective teacher. He's engaging and makes his lectures interesting while still managing to cover the material. He's great at breaking down problems and is very helpful in office hours. 115A is a difficult course, but he really tried to make sure we understood the material, and was definitely invested in our learning. His exams are very fair, nothing out of left field. He's a nice break from math professors who tend to drone on and copy straight from the textbook. Take a class with him if you have the chance!!