I use this tool to teach students the Next Dollar or Dollar Up strategy. It is very functional for independent work. I have found laminating these cards and having the students use a vis a vis marker this a great tool for independent work throughout the day, or as a part of a math center. The students see the cost and circle the appropriate amount of money needed. You can then see what the student needs additional assistance with, and target those skills. These cards include prices up to $10.00 and use both five dollar bills and one dollar bills.