A unit on nutrition, with charts that tell why one eats as well as what one should eat. Each class of food has a definite function; over fifty nutrients are needed for good health and they have been divided into six...

Ag in the Classroom is a resource for teachers who teach about agriculture. Information is provided about grants for teaching agriculture, links for resources, conferences, and a teacher page. The teachers page contains...

While Alfred Thayer Mahan may have been obsessed with the role of naval power in warfare, the 20th century saw the rise of air and space power in a way that might have surprised even Mahan himself. Persons with an...

Alice is a teaching tool for introductory computing and for teaching problem solving and sequencing skills. This downloadable software offers an innovative 3-D programming environment that makes it easy to create an...

This site explains why three percent is a fundamental limit of X-ray detectors that use the conventional method of conversion to electric charges, and if a higher spectral resolution is required astronomers have to...