National Library of Interactive Algebra Games http://nlvm.usu.edu/en/nav/category_g_4_t_2.html
Active Algebra Games by content http://www.shodor.org/interactivate/activities/
Math Is Fun http://www.mathsisfun.com/
Math Class Algebra Games http://classroom.jc-schools.net/basic/math-algebra.html
Math Warehouse Interactive Games http://www.mathwarehouse.com/interactive/
Illuminations http://illuminations.nctm.org/Activities.aspx?grade=3
Cool math sites http://cte.jhu.edu/techacademy/web/2000/heal/mathsites.htm
Math Playground http://www.mathplayground.com/games.html
Interactive Algebra Help Online http://www.intmath.com/
Fun Brain http://www.funbrain.com/kidscenter.html
Equation Blaster http://www.aplusmath.com/Games/PlanetBlast/index.html
Cut The Knot http://www.cut-the-knot.org/games.shtml
Game Quarium http://www.gamequarium.com/ http://www.gamequarium.com/
Cut The Knot http://www.cut-the-knot.org/index.shtml http://www.cut-the-knot.org/index.shtml
Eraser Dog Worksheets http://www.eraserdog.com/#worksheets
Cool Math. com http://www.coolmath.com/