ixl math practice
Activities for 1st-3rd grade
http://saxonpublishers.hmhco.com/en/onlineactivitiesk-3s.htm
adding games
http://www.fun4thebrain.com/addition.html
Activities for 3rd and 4th Grade
http://saxonpublishers.hmhco.com/en/onlineactivities3-5s.htm
Multiplying Games for 4th Grade