Solving 1 step equations involving addition & subtraction.
http://www.harcourtschool.com/activity/elab2004/gr5/19.html
Solving 1 step equations involving multiplication and division.
http://www.harcourtschool.com/activity/elab2004/gr6/12.html
Using a model to solve 2 step equations.
http://www.mathplayground.com/AlgebraEquations.html
Keeping the balance
http://www.topmarks.co.uk/Flash.aspx?f=CalcBalancev5
Solving Equations
http://www.mathplayground.com/shuttle_mission_math/shuttle_mission_math_game.html
8th Grade:
Solving 1 step equations involving addition & subtraction.
http://www.harcourtschool.com/activity/elab2004/gr5/19.html
Solving 1 step equations involving multiplication and division.
http://www.harcourtschool.com/activity/elab2004/gr6/12.html
http://www.mathplayground.com/SaveTheZogs/SaveTheZogs.html