http://www.math-drills.com/fractions.shtml
http://www.picadome.fcps.net/lab/currl/math/fractions.htm
http://www.shodor.org/interactivate/activities/CantorComb/
http://www2.karlskrona.se/nattrabyskolan/hasslo/decimal.htm
http://www.mathsnetgcse.com/index.php?mode=item&ref=1137
http://www.shodor.org/interactivate/activities/
http://www.jamit.com.au/welcome.html
http://www.jamit.com.au/worksheets/
http://www.jamit.com.au/worksheets/fraction6.php
Hot potatoesAdding fractions (Like denominators)
Subtracting Fractions (Like denominators)
Least common denominator http://demonstrations.wolfram.com/MultiplicationOfFractions/