Teachers get a FREE Coal Sample Kit from Teachcoal. The American Coal Foundation now making available Free Coal Sample Kits for growing number of classroom teachers in grades 3-5 that have a high-interes on science activities. The first Coal Sample Kit you order is absolutely FREE. Additional kits are available at a nominal price. Each kit contains 4 types of coal: Anthracite, Bituminous, Peat, Lignite. This four different types of coal samples are ideally suited for lessons related to rocks and minerals study units and other science curriculum topics. Log In