All subject 4th grade task cards with QR codes for self-checking centers (ALL subjects)! These 36+ sets of task cards with self-checking â–š QR codes â–ž are bundled for yearlong centers, and the QR codes link to PHOTOS of the answers (not just text!). Having the task cards link to the correct answers gives students instant feedback, making this a perfect independent review & test prep center and frees the teacher up to work with small groups or individual students. :) The visuals take self-che