Schlessinger Media.

Learn events and historical figures of the westward expansion. Find out how the Louisiana Purchase and the Gold Rush encouraged exploration and settlement of the U.S. frontier, and the relationship between settlers and the Native American population. Features reenactments, journal entries, and historic imagery.

Looks at the many forms of precipitation, the forces that cause them and how water in one form changes to another. Demonstrations show that air has weight and warm air rises, and a visit with a meteorologist illustrates how the measurement and observation of rainfall helps in determining the forecast.

Students get an in-depth look at the effects stimulants have on the body, while examining the deadly consequences of methamphetamine use. Physical dependence and tolerance are discussed along with harsh facts about withdrawal and the long-term effects of drug use. First-person accounts from young addicts and leading experts supplement the film's material.