Squares and Square Roots
Matching games - http://www.quia.com/mc/65631.html
Squared Riddles - http://www.rhlschool.com/math5n10.htm
Root Jeoparday -http://teachers.sduhsd.k12.ca.us/abrown/Activities/Jeopardy/RootJeopardy.htm
Square Root Activity -http://hotmath.com/hotmath_help/games/numbercop/numbercop_hotmath.swf