This is an activity that will enable you to introduce the concept of ecological succession in a group mode. This will replace your typical lecture. This is a very interactive activity that requires a lot of interaction between the teacher and the students. You need to preview the video before doing this activity so you know when to stop it to make the activity work. You will will need to call in at least 3-4 groups to share their answers before moving to another part or section. You will need to time each section so you can keep track and to make sure that your students are highly involved.