This St. Patrick’s Day themed math resource for first and second grades provides practice or review for the concept of one less/ more and ten less/ more for numbers 0-120. There are 20 one hundred twenty chart puzzles, in both color and black/ white, one per page. There are also 24 number cards, 12 per page, which can be used in addition to or instead of the puzzles. These are provided in color with a background, color without a background, and black/ white. A one hundred twenty chart is include