The PBS program "Nature" is a great video resource for teaching science. The program profiles many different organisms such as the leopard, the python, the wolverine, the elephant, the wolf, and many others. The website provides current and past episodes and is a great way to teach students about adaptations as a part of a unit of study on evolution. The study of adaptions can lead to discussion and further lessons on the concept of natural selection. There is a sample worksheet provided as an answer key for the episode on the leopard.