This is very EFFECTIVE if you are having a hard time controlling the class.Divide the class in 3 - 5 groups. If one student is talking or not listening, click for the zombie, and it will move closer to the plant. If everybody in the group is paying attention, you can click ADD PLANT. If the zombie is close to the plant, Click the plant and the zombie will eat it. This is fully animated with sounds. I'm sure the kids will enjoy this and you will have a very good class. This is very nice if you have parents observing.