Created as part of the BioEd initiative at the Baylor College of Medicine, this fine guide to the science of sleep and daily rhythms was authored by Nancy P. Moreno, Barbara Z. Tharp, and Gregory L. Vogt. The 32-page document is designed for use in a variety of classrooms, and it contains activities, worksheets, and information about how sleep studies are used to improve performance across a wide range of human endeavors. The activities here include "Using a Sundial," "Living Clocks," "Sleep Patterns," and "Investigating Sleep." Each of these activities is explained succinctly and thoroughly, and many do not required specialized equipment. One of the most interesting activities is the sun tracking board which allows students to track the sun's movements with just a bit of cardboard, several writing instruments, a ruler, and some string. Finally, the sleep cycle rhythms activity gets creative, as students are asked to write a few poems about their own sleep patterns.