Join the QR craze! This product includes 120 cards (60 colored & 60 black and white) to use in practicing subtraction from 10,9,8,7,6,5,4,3,2,1. Students first record their answer then self check by scanning the QR code. My students are VERY motivated to practice when using QR codes.
My class uses an ipad to scan, I have seen other classes uses the web cam on lap tops and also an ipod touch. If your devices do not have a scan app , you will need to download.
This product is aligned to the common core standards:
1.OA.6. Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.
2.OA.2 Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.