If you are teaching students about the harmful effects of marijuana, this powerpoint is a must have. This activity is one that will spark great discussion with your students about the short-term memory damage that is caused by marijuana abuse. During this powerpoint, students will attempt to remember two different groups of random pictures. Each group has over 50 pictures in it. The first time they will attempt to remember pictures with a normal brain. The second time, marijuana abuse will be simulated in their brain, and they will attempt to remember different pictures and compare their results. If you are intrigued, buy this product. Your students will be intrigued as well. Instructions on how to best implement the activity are provided. Thank you.