The fold-able is set up so that you can type in the problems you would like to use for your compound interest unit. Should fold into a book. Print pages front and back and layer them on top of each other in order, then fold in half. When printing, print a test copy to see if the printer will print the pages in the correct direction. May have to play with your copiers for it to work. Variables are listed in each practice area to help students identify what they have and need to look for.