This PowerPoint provides 31 activities that can be used to check for student understanding. They include both activators and ending activities. These activities are crucial in collecting student data on particular lessons. These checking for comprehension activities require very little materials and in some cases no materials are required. Can be used across content areas (ELA, math, science, social studies, etc.). I use these activities for my 5th grade classroom however I have seen teachers modify them for 3rd through 6th grade students.