One of the three basic states of matter, this fascinating title provides insight into the properties of gases. Although most gases cannot be seen, smelled, or tasted, they are always present. More →

Get ready to learn all about inclined planes in this fascinating new book! See inclined planes at work in ramps and roller coasters, as well as their other applications and history. Kids get… More →

Levers play an important part in all our lives! Without them we could not row a boat, move a wheelbarrow, or open a bottle. This book teaches children about the different kinds of levers.… More →

Pulleys help make up some of the most complicated machinery, from car engines to cranes. See how pulleys lift and move heavy things, how pulleys work together, and the different kinds of… More →

Screws are everywhere! From the cap on a bottle to a farmer's combine, screws help us lift, grip, squeeze, and move. Come inside the book to learn all about this fascinating simple machine. More →

Wedges are used to separate, lift, or hold things in place. One of humankind's most ancient tools, the wedge has a place in almost everyone's daily life. Learn more in this absorbing new title. More →

Read all about wheels and axles and their many uses in this new book. Children will be thrilled to learn of their many uses, from doorknobs to the insides of a clock. There are wheels that… More →

People spend more time looking through glass than thinking about how it is made. Glass shows readers what it takes to make glass, as well as the part glass plays in our daily lives.… More →

Age-appropriate text and vibrant photographs describes environmentally conscious changes that can be made in the classroom and throughout the school. From tips to saving paper to… More →

Unlike other metals, such as copper or lead, gold is prized for its beauty and scarcity rather than its usefulness. As a metal, it is too soft to use for tools or weapons, and is used mainly… More →