La compra de Luisiana (The Louisiana Purchase)

Introduce cachalotes, incluyendo sus diferentes partes del cuerpo, la forma en que viajan en grupos, lo que comen, y cómo cuidan a sus crías.

Newton's laws aren't the easiest science topics to digest. Struggling readers likely find understanding them even harder. This volume breaks down the topics of force and motion to its most basic and understandable parts, perfect to introduce to readers having a hard time or students looking to review for class. Written in succinct language, each chapter contains fact boxes and graphic organizers to aid all readers as they move from speed, to velocity and on.

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

A Swedish engineer arrives in Tenerife on a business trip. But it is Carnival time. Ullman soon learns that, during Carnival, one had better join the celebration.