Here are some of my favorite math sites. Yeah, yeah, I know I'm a dork but the fact that you are here looking at my math sites proves you are too. A small memorization challege in high school to learn 20 digits of pi snowballed into me memorizing 100 digits of the stupid number. I know this is lame but my wife who thinks I'm an idiot for doing it knows 30 digits herself. Its contagious. See how many you can learn.