Attached are 12 task cards over simplifying algebraic expressions. Each task card comes with a QR code that links to a video tutorial for the problem. There are three copies of the set of task cards. Each copy is a different color for help with organization in centers/stations. I print the task cards on card stock and them laminate so that they last longer. Once they are laminated the students can work out the problems on the card with dry erase marker and then use the code to check over their work.