Your Macro unit is coming up right? Stash this one away for the day you go over government taxing and spending. I always liked to list countries on one side of the board and tax rates on the other. Have the kids try to match up the countries to the income tax rates. I bet many of your students will think the U.S. has the highest income tax rates. Mine usually did. Be sure to distinguish between income tax rates, corporate tax rates, etc. as they are all over the place from one country to the next.