Make maths worksheets with this tool from microsoft. Just write one example question and the program will generate more questions of the same type and even provide an answer sheet.
http://ictmagic.wikispaces.com/Maths
Game Classroom is an educational games website catering to the K-6 market. Game Classroom offers mathematics games and language arts games. Games can be found by selecting a grade level and then a subject area. Both the mathematics and language arts categ