These vests are a wonderful addition to any math lesson. I am currently using them for comparing numbers, but they are also good for ordering numbers, adding and subtracting, etc. They are simple to make. Print onto cardstock. Cut on the line. Laminate. Punch 2 holes at the top of each and then thread with string or yarn. Students will then place them over their heads to make a number vest. There are cards for numbers 1 - 20, as well as >, <, +, - , and =.