To borrow shamelessly from Benjamin Franklin, guacamole is proof that God loves us and wants us to be happy. The Agricultural and Natural Resources people at the University of California-Riverside would seem to agree. In this Web site devoted solely to the lovely avocado, readers can learn all about the history and horticulture of this subtropical fruit (that's right -- fruit). Features include...

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...