http://www.eduplace.com/math/brain

Every Wednesday evening a new math puzzle is posted here for each of three grade levels‹grades 3 to 4, 5 to 6, and 7+‹along with the solutions to last week’s puzzles. The brain teasers are a fun way to get kids interested in doing math. They could be used as warm-up lessons for Thursday’s classes or a fun group activity on Fridays.