Some fun websites:
BBC Bitesize Numeracy and Literacy games and activities
http://www.bbc.co.uk/schools/ks1bitesize/
AAAMath Good for repeated practice
FunBrain Click on the ALL GAMES button on the right. Check out: Math Baseball, Number Cracker, Tic Tac Toe Squares, Guess the Number, MathCar Racing.
A Plus Math Games to reinforce basic facts. Planet Blaster – go to SET OPTIONS to choose other than addition.
http://www.aplusmath.com/Games/index.html
I Know That Click on Math on the left. When you click on the activities and it asks you to register, click MAYBE LATER
Math Playground Variety of math problems and topics.
RAINFOREST maths Interactive math activities K-6
http://www.rainforestmaths.com