A great maths site with excellent games. Really good for older kids too with some great games on Algebra, trigonometry, logic puzzles, worded problems, area perimeter etc
The Maths Arcade section of this website has some really fun games for students from P-6. They can choose their level and select a game to practice their maths skills independent.
Lots of good Internet based games: e.g Algebra puzzles which could be used to form the basis for a lesson or also could be used as an intro warm up or early finishers activity. Most activities would suit upper primary, however some extension students would benefit from playing the games.
Has a good selection of logic games e.g. factory balls and popular games, such as battleships.
Has a good selection of instructional maths videos, which look very useful.
Interesting puzzle based game in which students progress towards an ultimate goal. More of a long-term game that could be used over an extended period of time. Aimed at middle school. Needs password and login. Is free to obtain.