After I took Physics 6C with Prof. Rosenthal I felt compelled to write and say what an amazing teacher he is. His website is amazing (and helps immensely with keeping track of your grade relative to the rest of the class, class notes, and online quizzes - which really are a joke... therefore an easy grade booster), he is a genuine guy that cares immensely that every student learns the material. He will review things over and over again to make sure that the students are learning and I never saw him get frustrated. Another awesome thing is that rosenthal knows everything. He could not be stumped by any question. His in class demos (in every class) made this the best physics class I took at UCLA. I mean who couldn't like a teacher who says that on the last day of class we're going to try to "blow up as much stuff as possible." Rosenthal is the man. Take his class and feel good about it.