Using these timings with my students daily really helped them to memorize their perfect squares. I set the timer for 2 minutes ( I would shorten this to 1 minute eventually) and then go over the answers with them. At the end of each week they would have a timing for a grade. This product includes: 5 different perfect square timings that include squares from 2 to 20 and 25.40 problems per timing.A statistics sheet for students to keep track of their progressAnswer Keys