Adele Richardson

Introduces the geography, daily life, history, culture, and natural resources of Mexico.

Describes the history of Bill Gates's Microsoft Corporation and its impact on the computer industry.

Describes early models, major parts, and the workings of transport helicopters.

Introduces the function, parts, and uses of telescopes, and provides instructions for two activities that demonstrate how a telescope works.

Describes the life of dolphins and their relationship with people.

Describes the physical characteristics, hunting methods, and distribution of scorpions and their relationship with humans.

Describes the physical features, habitat, hunting, and mating methods of hognose snakes.