K12 MoneyK12 Inc.K12 Money lets you practice identifying and solving math problems with money. Count, match, and make change with U.S. coins up to quarters and bills up to $20.Available For: iPhone (Free)K12 MoneyK12 Inc.K12 Money lets you practice identifying and solving math problems with money. Count, match, and make change with U.S. coins up to quarters and bills up to $20.Available For: iPhone (Free)