I have found many of these links helpful and interesting. Please visit them in your spare time. (The first two are especially good)
A Cybrary of the Holocaust
http://www.remember.org
The Holocaust: A Tragic Legacy
library.thinkquest.org/12663/
We Must Remember...
http://www.kahane.org/holocaust.htm
Anne Frank Center USA
http://www.annefrank.com
Holocaust Educational Resource (Nizkor Project)
http://www.nizkor.org