An Ideal Math Manipulative for Teaching About Money Use these handy magnetic manipulatives in your lessons about money to introduce coins, their denominations and how to make change. The magnetic coins adhere to classroom white boards or any other magnetic surface. The 72 coins are evenly split between heads and tails. The set contains 8 quarters, 12 dimes, 12 nickels and 40 pennies. An excellent companion to this set is Magnet Math Magnetic Bills, 17178-00. Appropriate for Grades 2+