I would use QR Codes in the classroom for a number of activities. Whether it was literacy, math, science or any subject, QR codes get students used to using technology in a fun and creative way. The student would grab a cube and complete each of the activities as part of a daily task. I would use this in my 1st grade classroom.
Reflection Facilitated by QR Codes - another awesome idea by Tony Vincent! The dice (which you will cut out, fold, and glue) has five options and one free choice to help students express their responses with partners or groups. Options include drawing the response, making the response rhyme, and creating a visual quote. Each code on the dice leads to a helpful mobile-friendly resource for that option.
This may seriously be one of the most unique, age appropriate, best practices ideas for 1st grade tech-infused teaching & learning! LOVE LOVE LOVE!!! Reflections on Teaching, Learning, and Technology: QR Fun!