Do you have early finishers?? We all do! Use this easy, no prep, math review PowerPoint OR Google slides activity to practice facts and keep those early finishers busy! Simple press "play slideshow" and you are good to go! Students will see a math problem (addition 1-20) and they will have about 6 seconds to record their answer on a piece of paper or their whiteboard. After a few second the answers will pop up for them to check their own work without bothering you!!