12 pages of 2nd grade Common Core related math vocabulary practice with QR codes for students to self-check their work. Each page has four to seven vocabulary words. Students match the words to the definitions or examples and then scan the codes to check their answers. There are boxes provided at the bottom of each page for students to track the number of correct responses. These pages work great for invidual, partner, or small group work. They would also work well for formative assessment (consider using them before and after a unit to check for pre and post vocabulary knowledge). Please note: Your students will need access to a mobile device with a QR scanner to utilize the QR code feature.