Reading Planet
ABC Spellit
Grammar Gorillas
Words and Pictures
Homonyms
Language Arts Games
Reading Games
FunBrain Spelling
FunBrain Word Games
Grammar of Doom

National Library of Virtual Manipulatives
Cool Math for Kids
Count On Math Games
MegaMaths Tables
A+ Math
AAA Math (choose your grade)
BasketMath
Batter's Up Baseball
ChangeMaker (choose your level)
U.S. Mints Site Games for Kids
Prongo Games
Math Games
Kids Place Houghton Mifflin Math
Money Factory
Piggy Bank
Math:  Illustrated Lessons

Bones:  An Exhibit Inside You
EcoKids
Space Games
EcoGames
Science Games
Jefferson Lab Games & Puzzles
Funschool Science Games
Forestry Tree ID

GeoBee
History Mystery
State Capitals Quiz
Online Map Games
USPTO Kids Games
Name That President
Social Studies Games

Professor Garfield
Internet 4 Classrooms
FunBrain
JigZone (choose how many pieces you want in your puzzle)
Mystery Net Kids Mysteries
KidsCom
Kids Space
Kid Wizard Games
Jigsaw Land
Eduplace Kids Games
BBC School Games
You've Got to Be Kidding
4Kids2Play
Headbone Zone Games
Education.com Games
Learning Planet.com
Gamequarium
Interactive Educational Games
Teach-nology Games
I Know That
Weekly Reader