Here is an easy way to demonstrate to elementary and middle school students that numbers have relationships and that data can be used to make better decisions. The spreadsheet is already pre-designed so that teachers who may not be as comfortable with Excel or math can still implement it. Notice when you change the price of gasoline that the other numbers change? How much money is really left over for pizza? Designed by a successful math and science tutor whose students' standardized test scores grow by hundreds of points (SAT) and dozens of percentiles. Meets Common Core Standards.