Figure This! Provides interesting math challenges for students to do at home with the family
http://www.figurethis.org/
National Geographic for Kids http://www.nationalgeographic.com/kids/
Math Models and Economics http://www.amaisd.org/nheights/zennadi_&_james_project.htm
Puzzle 1 http://teacherweb.com/TX/Hopewell/schronk/NumberBlock3.htm
Lemonade Stand http://4webgames.com/lemonade/singleplayer/play.php
Tangrams http://pbskids.org/cyberchase/games/area/area.html
Rushhour http://www.puzzles.com/products/RushHour/RushHourApp.htm
Who wants to be a millionaire http://www.counton.org/games/mathonaire/
Mancala http://www.rocketsnail.com/mancala/classic.htm
Checkers http://www.mathpower.com/checker1.htm
Set Game http://www.setgame.com/set/puzzle_frame.htm
Tetris http://hotmath.com/index_hm.html
Factor Game http://illuminations.nctm.org/tools/tool_detail.aspx?id=12
Mastermind http://nlvm.usu.edu/en/nav/frames_asid_288_g_1_t_1.html?open=instructions
Mahjong Solitaire http://www.shockwave.com/sw/content/mahjong
Meltdown Madness http://games.funschool.com/game_meltdown_madness.html?g=1654&category=0&level=8
Sliders fun with numbers http://www.mazeworks.com/sliders/index.htm
Math Games - Integers http://www.aaamath.com/B/grade8.htm