Fun Brain: Educational games across the curriculum
http://www.funbrain.com/kidscenter.html

Game Goo: Educational games across the curriculum
http://www.cogcon.com/gamegoo/gooey.html

AAA Math
http://aaamath.com/B/grade3.htm

Math Baseball
http://www.funbrain.com/math/

Multiplication Practice
http://www.multiplication.com/interactive_games.htm

Fun School
http://www.funschool.com/games_popup.php?g=ms2_ds1&t=j&w=620&h=360

Favorite Authors
http://www.ahisd.net/campuses/cambridge/library/chilauth.html

Typing Practice
http://www.bbc.co.uk/schools/typing/

Time for Kids
www.timeforkids.com

Milton S. Hershey: The Hershey Company http://www.hersheys.com/discover/

Simple Machines
http://www.coe.uh.edu/archive/science/science_lessons/scienceles1/finalhome.htm

Ed Heads - Simple Machines
http://www.edheads.org/activities/simple%2Dmachines/

Earth,Sun & Moon
http://www.earthsunmoon.co.uk/

Plants
http://www.urbanext.uiuc.edu/gpe/case1/case1.html