Text and pictures introduce the pulley, a simple machine used primarily to lift heavy objects. Includes audio, videos, activities, weblinks, slideshows, transparencies, maps, quizzes, and supplementary resources.
Text and pictures introduce the lever, a simple machine used to change force and motion. Includes audio, videos, activities, weblinks, slideshows, transparencies, maps, quizzes, and supplementary resources.
"Provides comprehensive information on alcohol abuse, including first-person interviews, signs and symptoms, physical dangers, recovery, and solutions"--Provided by publisher.
Offers factual information about HIV and AIDS, providing an overview of the pandemic, discussing how they effect families, addressing connections to poverty, and exploring prevention, treatment, and related discrimination.
