Incorporate technology to practice solving 1 more, 1 less to 20 with fun QR codes! Students will need a mobile device with a QR code reader such as a tablet, iPad, iPhone, etc. The problems are all 1 more, 1 less, up to 20. There are 20 cards that could be divided up into different days. It's up to you! This activity includes 20 QR task cards, a student response sheet, and an answer key. This was originally written for kindergarten but could be great for a remediation activity for those needing