The PDF file is designed to be a self-correcting subtraction station. This is a fun, unique, and self-correcting station for reinforcing and reviewing differences to 20. This file includes DIFFERENCES for 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 and 20. My students can’t wait to finish their work so they can get into this station. I make multiple copies of each fact so my students can race each other to see who can finish same facts first. I have noticed a big difference in my students’ automaticity and fact cognizance.
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