Three-chart set is the perfect complement to your Ecology curriculum. Each 17.5” x 12” chart is double-sided and laminated. One side provides an illustrated overview of the topic, while the reverse features “write-on/wipe-off” graphic organizers, problem-based questions and other review activities. The Ecology Bulletin Board Chart Set includes the following charts: Ecosystems, Food Chains & Food Webs Cycles of Life & Biomes Relationships Among Living Things.