Math Textbook online Username and password are on the inside of each child's agenda http://www.eharcourtschool.com/
Multiplication practice: Lots of fun games to improve your skill with multiplication facts. http://www.shastalink.k12.ca.us/bellavista/Manning/interactive_multiplication_fun.htm
More multiplication fact practice http://resources.oswego.org/games/mathmagician/mathsmulti.html
Several math fact games http://www.mathcats.com/explore/multiplicationtable.html
Builder Ted: Place value game with decimals Place Value
Place Value Pirates: Practice place value with decimals http://www.mrnussbaum.com/placevaluepirates1.htm
Interactive Factor game http://illuminations.nctm.org/ActivityDetail.aspx?ID=12
Math activities http://www.aaamath.com/
Fraction/Decimal/Percent models http://illuminations.nctm.org/ActivityDetail.aspx?ID=11
Math activities using manipulatives http://nlvm.usu.edu/en/nav/vlibrary.html
Tangrams http://pbskids.org/sagwa/games/tangrams/index.html