When teaching about U.S. Federal spending one of the most effective ways to show how the U.S. spends tax dollars is to: When teaching about U.S. Federal spending one of the most effective ways to show how the U.S. spends tax dollars is to: A. Show students a pie chart from the Congressional Budget Office B. Google a pie chart showing federal spending for the most current fiscal year C. Show students the Congressional Budget Office 23 page report on federal spending D. Have students google the information themselves and report back on what they've found