Your students will love to learn about how to recycle with this fun sorting game! I like to teach a unit on Earth Day and good ways to keep our planet healthy. Prior to the activity, we talk about good ways to keep how the Earth healthy, and how to recycle different materials. As a whole group, we sort the pictures into categories (paper, plastic, aluminum and glass), and then I set it out as a science center activity. I have included a color version and a black and white version, which can