Armentrout & Armentrout 
Salvar el medioambiente [PDF ebook] 
Saving the Environment

Rocketry: Investigate the Science and Technology of Rockets and Ballistics introduces students to the fascinating world of rocketry and ballistics. Readers discover the history of rocket development, …

Perfect for fans of Wimpy Kid, Tom Gates and Barry Loser, the third book in Stephan Pastis’s New York Times bestselling series sees Timmy Failure striving for greatness once more – with unexpected co …

A charming children“s Halloween story about a little witch“s adventure with her grandmother while dyeing wool. With twenty one hand-painted illustrations gracing the pages of the book. If you wish …

A school trip that turns into a nightmare. Two boys have the adventure of their lives when they meet lovable and evil characters; also a monster that intertwine with one of the boys. …

Soil! We walk on it, play in it, build with it, grow our food in it, and get antibiotics from it. But what exactly is soil? What makes it so important? Can we survive without it? In Explore Soil! Wit …

American author and naturalist Henry David Thoreau is best known for living two years along the shores of Walden Pond in Concord, Massachusetts, and writing about his experiences in Walden; or, Life …

I’m Madgewick, Madgewick the mouse, and I would like to share a story with you about a dragon named Da’Vid. Da’Vid’s is sent on a quest to: “Go to the four corners of the world and meet four times fo …