Las ballenas

"Simple text and color photographs introduce basic concepts of above and below--in both English and Spanish"--Provided by publisher.

An introduction to the educational background, equipment, clothing, and various duties of a construction worker.

Examines the nature of inclined planes and wedges, how they can reduce the amount of force necessary to perform work, and ways in which they are used.

With life-like illustrations and simple text, books in this series introduce children to different dinosaurs and the unique characteristics. Children learn the features of each dinosaur, what they ate, and whether they were predator or prey to other dinosaurs. The books also introduce fossils and how they play a role in our knowledge of dinosaurs' existence.