Sleep, Sleep Disorders, and Biological Rhythms is a curriculum unit (for grades nine through twelve) offered through the National Institutes of Health (NIH) Curriculum Supplement Series. This unit was developed collaboratively by the National Heart, Lung, and Blood Institute (NHLBI) and other groups as "a creative inquiry-based instruction program designed to promote active learning and stimulate student interest in medical topics." This curriculum supplement is designed "to complement existing life science curricula at both the state and local levels and to be consistent with _National Science Education Standards_." The Teacher's Guide contains five lesson plans and information sections on Sleep, Using the Web Site, References, Implementing the Module, and more. The unit also offers interactive activities for students. The site contains a downloadable copy of the Teacher's Guide, as well as information about the NIH and NHLBI.