Artsology - Free online games related to the arts and music
Cryptogram - Test your wits with these cipher puzzles! Learn to break ciphers.
Mathjong - Math mahjong
Math Invaders - Math game
Jigsaw puzzles - Daily jigsaw puzzles
iSudoku - Sudoku puzzles
Lumosity - Brain training
Little Alchemy - Earth science and elements game
Duckie Deck - Toddler & Preschooler games
Doctor Games - Simulated surgery games
Cell Craft - You're a single cell organism!
Hoodamath - Math and science games
Jowli Games - Super Math Jump & Tiny Math Planets
Count Money - Learn to count money with your pirate pal!
Learning Planet - Games organized by grade group from preschool to 7th grade and beyond.