So if you think the After Effects tutorial in class today was a little quick, or you didn't get something, you should check out is Video copilot: http://www.videocopilot.net/tutorials/
It's a pretty cool site, and instead of just being like "oh, this is how you use After Effects," they actually show you how to do certain effects. All of their tutorials are separated so that you can even look for the one you want and work alongside the video they provide. It is absolutely free, and it is highly useful if you are unsure of how to do those things on After Effects. It's a pretty fun/nifty little site, so go ahead and check it out. You will get far more out of actually going there than my talking about it.