Students can actively practice number sense using this giant 100's Chart Floor Puzzle! I use this as an activity for small groups or as one of our centers in my Kindergarten class. It will work great for many primary grade levels, or anyone who needs practice with number sense! The first few times it seems like a huge challenge, but as soon as one group successfully creates the puzzle, then the rest of your class will be itching to do it too! Simply print the number cards in each row of ten on different colored paper, or you can use the second set that I included that features different colored font for the numbers. I laminated my cards so this center could bring fun to my classroom for years to come!