It's now $50. If you're interested you should sign up quick next year...right now there's about 75 in the class? There was a waiting list, I think, since there wasn't enough room. All lectures are now mandatory, though you are allowed to miss one. Also, if you do well on the quizzes ( which are very easy, they are only 3 questions long and basically for attendance-taking purposes), then the following year you can do a lab portion for which you can get 4 units (for 199). It's pretty interesting. The only thing is that it is in the evenings (5:30-7:30) and most of the time I'm drained. It's only every other week though, for a total of 10 lectures throughout fall/spring.