The National Academy Press has crafted hundreds of resources for science educators, and this online book will be most helpful for those seeking to incorporate discussions of evolution into their classroom. The book contains seven complete chapters and five appendices. The chapter titles include "Why Teach Evolution?", "Evolution and the Nature of Science", and "Major Themes in Evolution". Chapter Six is definitely worth a look as it includes eight separate activities designed to be used in the classroom. They include investigations into natural selection, looking at explanations of fossil footprints, and examining connections between population growth and biological evolution.