Here are some math links
http://www.pinterest.com/mstarahclass/
You may need to copy and paste these links into the web browser to connect to these websites.
http://www.softschools.com/math/games/fishing_add.jsp
http://www.learninggamesforkids.com/keyboarding_games.html
http://www.coolmath.com/
Here are some reading links
http://www.starfall.com/
http://www.roythezebra.com/reading-games.html
http://www.storylineonline.net/
http://www.dositey.com/2008/index-page-free_activities-sub-34.php
Here are some Social Studies links
http://www.panwapa.com/panwapasplash.php?intro=no
http://www.fekids.com/img/kln/flash/DontGrossOutTheWorld.swf