This is a puzzle game where children have to identify a number by counting tally marks, base ten blocks, and solving addition and subtraction facts. Number puzzles from 5 to 20 are included. This activity supports CCSS 1.OA, 1.NBT. It can be differentiated according to your students' needs. This activity can be played as a center or it can be played with the teacher and student partners.Or children can simply work together to assemble all 16 puzzles instead of playing it as a game. If you download this game please take the time to rate my work. Thank you!