Hey guys, I'll take ordinary differential equations this summer. Class starts on June 4th. I wanted to get a head start on the topic because i'll take it with a professor that usually gives VERY hard exams, and I was wondering if anyone could recommend me a good site or something to start studying right away (even if it's only these two weeks). Just got my book today, I got this one: https://www.amazon.com/Fundamentals...7747/ref=sr_1_2?ie=UTF8&qid=1337655299&sr=8-2 I saw that MIT has the course on OCW. Is that recommendable? Is there a better one that I don't know of? Thanks a lot in advance.