QR Codes in the Classroom

I am a 4th grade math teacher. My students work in stations each day. In order for me to work in a small group in “teacher time”, My stations have to be reinforcements of lessons I have already taught. One method I use every day is the QR Codes. I create task cards with codes on them so the students can scan them. They work in small groups and discuss the answers before they scan. This allows them to see right away if they got the answer right or wrong. A great website to use is https://www.the-qrcode-generator.com/. Students are so motivated solving problems. You can use a computer or ipad.