Matching fractions, decimals, and percents game http://www.bbc.co.uk/skillswise/numbers/fractiondecimalpercentage/comparing/comparingall3/index.shtml
Decimals/Fractions matching and concentration game http://www.quia.com/jg/65724.html
Converting Fractions, decimals, and percents worksheet game http://www.mathgoodies.com/lessons/vol4/challenge_vol4.html
Adding Positive & Negative Integers http://www.aaamath.com/B/g8_65_x1.htm#section3
Integer Concentration http://www.dositey.com/math58.htm#negative
Algebra Matching/Concentration/TicTacToe http://jc-schools.net/tutorials/ms/math.htm
MathCar Math - Will your car win? Fun with integers http://www.funbrain.com/osa/index.html