Friesen, Helen Lepp

An exploration of tornadoes, covering what causes them, chasers, myths about them, significant tornadoes, and more.

An introduction to Vermont, covering the state's location, history, flower, seal, flag, capital, goods, and more.

An introduction to Rhode Island, covering the state's location, history, flower, seal, flag, capital, goods, and more.

An introduction to Oklahoma, covering the state's location, history, flower, seal, flag, capital, goods, and more.

Provides information about Niagara Falls, discussing how they were formed, their physical features, how they used to make power, and more.

Photographs and simple text provide an introduction to Uncle Sam. Includes audio, videos, activities, weblinks, slideshows, maps, quizzes, and supplementary resources.

Photographs and simple text provide an introduction to Uncle Sam. Includes audio, videos, activities, weblinks, slideshows, transparencies, maps, quizzes, and supplementary resources.

An exploration of tornadoes, covering what causes them, chasers, myths about them, significant tornadoes, and more. Includes audio, videos, activities, weblinks, slideshows, transparencies, maps, quizzes, and supplementary resources.

An exploration of crystals that covers what they are, where they are found, how they grow, their uses, and more. Includes audio, videos, activities, weblinks, slideshows, transparencies, maps, quizzes, and supplementary resources.

Text and photographs look at gemstones. Includes audio, videos, activities, weblinks, slideshows, transparencies, maps, quizzes, and supplementary resources.