iMake Change is a money calculator that shows you how to best make change for a given amount of money.
It works like a real calculator for adding and subtracting money, with two different input modes.
Input mode 1 has numerical buttons like you would see on a normal calculator. You can also switch to input mode 2, where all the buttons are bills and coins. In either mode you can add and subtract money. When you get to the desired amount, just hit the "make change" button and the calculator will show you how to break the amount in the display into bills and coins.
This is a valuable tool for children learning to work with money, as well as for older students who require a little extra help.