The following are useful websites which contain various types of educational games and programs, which will keep students wanting to learn.

http://www.bbc.co.uk/schools/games/
This website is the best of all educational game websites I have seen. The games are extremley interactive, bright, colourful and will grab students attention. There are an extensive list of games covering vast subjects and area's or learning, for almost all ages.

http://www.funbrain.com/
Fun games website only for Primary school. Nice bright colours and pictures.

http://www.sheppardsoftware.com/web_games_menu.htm
Another good website for educational games, however the nobel prize and bbc sites are much more efficent.

http://nobelprize.org/educational_games/
One of the best sites I have seen for educational games.
Great games, had a good game for those studying Lord of the Flies.