http://www.primarygames.com/contractions/start.htm(contactions)
http://school.eb.com/lm/games/GE_2_17/GE_2_17.htm(contractions)
http://english-zone.com/spelling/cont-01.html(contractions)
http://www.sadlier-oxford.com/phonics/flyby/flyby1.htm(contractions)
http://a4esl.org/q/f/z/zz45fck.htm(contractions)