Maths games to help you practice what you know.
http://nrich.maths.org/frontpage Choose lower primary
http://primarygamesarena.com/Year-2 Choose Year 2 or Year 3 then play a game.
http://www.coolmath-games.com/ Cool Maths games for practice.
http://www.numbernut.com/basic/activities/index.shtml
Choose Grade 1 or Grade 2