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Discusses the orbit, atmosphere, surface features, and exploration of the planet Neptune....
This book describes Venus, the second planet from the Sun. The text discusses Venus' distinguishing characteristics, its position in the solar system,...
Principles of Classical Mechanics
Have you ever wondered why things drop to the ground instead of float or fly? Or how a heavy satellite can orbit Earth without crashing into it? From ...
Outraged people claimed that Darwin's theory had made humans the relatives of monkeys. Scientists were sure that species changed over time, but no one...
Explains how scientists' observations of the stars led to the development of the big bang theory, a theory of how our universe was formed....
The Science of Storms
What causes thunderstorms and lightning? Where and why do hurricanes form? How are blizzards more dangerous than other snowstorms? To answer these que...
The Science of Weather Forecasting
How do scientists predict the weather? What tools and instruments help them make forecasts? How far in advance can they make good predictions? Weather...
Principles of Fluid Mechanics
Do you know why a 10-ton boat floats but a tiny pebble sinks? Or why a hot air balloon will rise, but when you inflate a balloon it drops to the groun...
6 PACK, PART OF EARLY BIRD FOOD WEBS SET...
Seals, otters, oysters, fish, pelicans, and sharks are a few of the animals that make up an ocean food web. But did you know that almost all ocean cre...
Prairie dogs, vultures, grasshoppers, goldfinches, pocket gophers, and bison are some of the many animals that make up a grassland food web. But do yo...
Moose, lemmings, owls, wolves, bumblebees, and grizzly bears are some of the many animals that make up a tundra food web. But did you know that worms,...
Frogs, minnows, snails, ducks, catfish, and muskrats are a few of the animals that make up a lake and pond food web. But do you know why mosquitoes, m...
Snakes, lizards, rabbits, mice, mountain lions, and hawks are some of the many animals that make up a desert food web. But do you know how desert anim...
Principles of Matter and Thermodynamics
Have you ever seen a magician make something disappear and question if anything could really just vanish? Do you know why the periodic table is set up...
Principles of Light, Electricity, and Magnetism
Did you know that both electricity and light move in waves, like water does? What does electricity have to do with magnets? From Benjamin Franklin and...
A brief introduction to ants, describing their history, physical characteristics, habitat, young, food, enemies, and relationship to people....
Beetles, toads, squirrels, owls, deer, and black bears are some of the many animals that make up a forest food web. But did you know that leaves, berr...
Describes the role of an oak tree in the ecology of the Pennsylvania forest in which it lives....
Examines the activities, plant and animal life, and climatic changes found in an alpine meadow in the Rocky Mountains....
An Accelerated Program to Help Students Develop Their Writing Skills
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Describes how the plants and animals of the tundra serve as food for each other....
100+ Games That Make Kids Think
Be the one to make a difference in your students' thinking! With more than 100 games to choose from, Brain Food is your one-stop source for exploring ...
Describes the physical environment of a salt marsh and the plants and animals that live there....
Introduces the components of a lake and pond food chain, including plants, plant eaters, meat eaters, and decomposers....
Introduces the components of a forest food chain, including plants, plant eaters, meat eaters, and decomposers....
Machines and Constructions
Describes the interior of such objects as a piano, telephone, clock, toilet, and camera, and explains how these devices work....
Presents definitions of terms most commonly encountered in discussions of the nuclear arms race....
A Handbook for Young Advocates
A resource guide for young people to learn political action skills that can help them make a difference in solving social problems....
Cooperative Problem-Solving Puzzles
Classroom tested puzzles designed to be solved by small groups of students, gr. 5-8. The puzzles promote teamwork and interpersonal cooperation, while...
The Inside Scoop
Presents the ingredients that make up ice cream, recounts the history of the dessert, and describes how to make ice cream by traditional methods and h...
Provides information about terms, from "abiotic" and "flood plain" to "oil spill" and "zooplankton", related to a wide range of environmental concerns...
Photographs and text document the creation of a violin by master violinmaker John Larrimore....
Learning Tools collection -- lessons, activities and reproducibles for classroom and home schooling....
More Cooperative Problem-solving Puzzles
Tanglers Too! will help students develop problem-solving skills, improve their ability to work cooperatively, enhance reading and math comprehension, ...
Cooperatiave Problem-solving Puzzles
Fifty More Cooperatiave Problem-solving Puzzles