Profesor Larkin is VERY smart, but his lectures are structured completely around conceptual ideas, yet his exams are all problem-solving. It makes no sense how we are actually supposed to learn and practice the problem-solving. He maybe walked through a total of 10 problems the entire quarter. The homework also was not helpful and made us work through problems for hours that were not even included in the lectures. He was quite rude over email. The exams are difficult for no reason and include deep analysis and revision on variables we didn't cover in class, and he just expects you to know how to set them up. The TA's reviewed problems that didn't even appear on the exam. This is one of the hardest classes I have ever taken. There are much easier physics professors out there. Save yourself.