Use this page and find the 5th grade link on the left hand side. Many games for skills in Social Studies, Language Arts, and Math too!
http://www.internet4classrooms.com/grade_level_help.htm
http://www.internet4classrooms.com/grade_level_help.htm
The cool thing you see below is called a Symbaloo Webmix. The tiles are color coded according to subject. Just click on a tile to get to the website you need super fast!