Barnes and NOble sells math dice. It's 2 12-sided dice and 3 regular dice. You roll the two 12-sided dice and multiple to get the target number. Lets say you roll 4 and 3, the target is 12. You then roll the 3 regular dice and try to get as close as you can to 12. Say you roll 6, 2, 1 you can add to make 10 or 6x2-1 to get 11 or 6x2x1 to get 12. Once student progresses, allow squares so if you have a 2, you can square one of the 2 remaining numbers.
There is also a game called 24 which is a similar principle but it consists of cards w/ numbers on them and using those numbers you have to make 24.
