Relatos de la conquista de América

Presents aerial photographs of various scenes from around the world including fishermen in Morocco, a farm on the island of Crete, and a mangrove forest in New Caledonia.

Introduces young readers to the number two with simple text and photographs of items in groups of two.

"Simple text and color photographs introduce kinds of motion, including motion powered by wind, water, and electricity--in both English and Spanish"--

What is work? You may think work is doing chores or going to a job, but you do work every time you move something from one place to another. With experiments that demonstrate these fundamental concepts, discover how you work, and how simple machines make doing work easier.