All links may be considered sources. While some of them are merely personal webpages, several are OFFICIAL educational sites and should suffice for research purposes.
By the way, want to know something really creepy?? I was researching my topic, and I ran across this page. I was like "DUDE, freaky." ;) Anyways, please give me an A in your class!!! I don't want to take your exam, because I'll fail!!!! I LOVE YOU FOREVER, MS. SNIDER!
The coolest student you ever had (who you intend to give an A),