To begin, I made several missing addend problems for students to solve. I replaced the "mystery box" with a QR code that led to the correct answer. I used this great website to create the QR codes. Students moved around the room to find the different problems to solve.
Students solved their mystery box problems and recorded their answers on their recording sheet. Then, students went to the iPad and checked their answer using the QR reader. Students then had to circle whether they got the answer correct or incorrect. If the answer was incorrect, they had to correct their answer.
The students had a lot of fun using the iPad and the QR codes. The activity also helped students take ownership of their own learning by having them check their own work and correct their mistakes. This activity can be done with minimal teacher support. If you would like a copy, head on over to my TPT store!
How do you use QR codes in your teaching?