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.
How To Trick People Into Thinking You’re Tech Savvy
Create a QR with your wifi password on it for when guests/friends come over and want to use your internet. Instead of awkwardly trying to talk people through it, simply have them scan the code and get browsing.