Brain Pop http://www.brainpop.com/
Sheppard's Software http://www.sheppardsoftware.com/
I Know That http://www.iknowthat.com/com
National Geographic for Kids http://kids.nationalgeographic.com/
National Gallery of Art for Kids http://www.nga.gov/kids/kids.htm
Fun Brain http://www.funbrain.com/
Math Games http://www.mathgames.com/
Skills Tutor http://www.myskillstutor.com/login.jsp
King's List of On-line Math Activities http://www.k111.k12.il.us/king/math.htm#Factors/
Create-a-Graph http://nces.ed.gov/nceskids/createagraph/
Science Textbook http://www.mhschool.com/science/2002/student/unitlist.php3?vGrade=5&vAlt=Tiger
Ticket to Read http://www.tickettoread.com/