Some resources for your use:

http://www.glencoe.com/sec/math/msmath/mac04/course1/index.php/na   (For Math 6)

www.ixl.com/math/grade/sixth/

http://www.visualfractions.com

http://www.multiplication.com

http://www.aaamath.com

http://hrsbstaff.ednet.ns.ca/mbrace/math.htm