Swap worksheets for code breakers with these addition and subtraction within 20 Escape Rooms, exciting math mystery designed for First Grade. This no-prep activity/game includes both digital Google Slides (great for whole class activity) and printable making it perfect for math centers, sub plans, morning work, test prep, end of year review, or homeschool use. Students will practice addition and subtraction within 20, strengthening their fact fluency as they solve clues, crack secret codes, and