FREEBIE! First-grade Addition (add within 20) has 81 addition problems in the format of a Tic-Tac-Toe game. Students work with a partner on the skill: add within 12. There is no need for teacher-grading or an answer key since each player must check the answer of their opponent (an incorrect response results in a loss of a turn).
Download this pdf and try it in your classroom for FREE. If your students like this activity, then there are 59 more in a packet available at my TPT store: Addition Tic-Tac-Toe
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