SamizdatMath

How much Cash is in that Stash? If you've ever struggled with finding a fun and effective way to teach the distributive property of multiplication over addition and subtraction, this is the activity for you. Using the example of a suitcase full of dollar bills, students will learn how to effectively count the cash in groups by dividing up the cash into smaller rectangular arrays, whose products can be combined to find a solution. This activity includes a sample problem, specific teaching instru

Ben and Ilene are having an argument: they are looking at a number line with a 0 on one end, and 1 million on the other end. The question is: where would 1 thousand be? Ben & Ilene have different insights into the problem: Ben says that 1,000 is a large number and so is a million, so it must be close to that side. Ilene says that 1 thousand is much smaller than 1 million, and it belongs closer to 0. Is either of them correct, or is one of them "more correct" than the other? I've included 5 exam

Tired of the old "make a flat" game? Do you want your kids to enjoy learning about and using place value? Close to a Flat challenges children to think about place value when planning strategy to win a game: in 5 rounds a student chooses between cubes and rods to get as close to making a flat as possible, or in 6 rounds, choosing cubes, rods and flats to make a thousand cube. This game includes puzzles for kids to take home, as well as mats to keep track of cubes, rods and flats. There is also a