http://www.math-play.com/exponent-game.html
http://www.math-play.com/Exponents-Jeopardy/Exponents-Jeopardy.html
http://www.slidermath.com/wjava/Expnt2.shtml
http://www.studystack.com/matching-14392
http://www.funtrivia.com/playquiz/quiz18710227758.html