Piedra de toque

The early nineteenth century in the United States was a study of contrasts. On the one hand, the Jazz Age brought cultural liberation, vivacity, and reckless consumption; on the other, the Great Depression brought poverty and desperation to millions. Explore these periods in American history through the eyes of the people who lived them.

Presented in a large-size picture book format, this is the story of the Mars Rover Curiosity. It explains how it was built at the Jet Propulsion Laboratory in California, how it got its name, how it got to Mars, and what its mission hoped to accomplish. A timeline about the history of Mars exploration is provided at the end.

Expanding on our popular Let’s Explore Science series, this book focuses on the scientific method. The scientific method is a step-by-step process for solving science problems. Scientists use it every day. Explaining each of the five parts; observing and asking questions, researching your topic, forming a hypothesis and testing it, designing and conducting an experiment, and analyzing and drawing conclusions from your result are all mapped out in detail. Learn how this straightforward topic can sometimes be a little trickier than it seems! This book will allow students to generate and...

English-Spanish bilingual edition teaches young children simple manners and kind behavior. When children are kind, courteous, and respectful, people enjoy being around them and reciprocate with the same behavior. Use this English-Spanish bilingual book to teach manners and help young children understand the importance of showing politeness, speaking kindly, using basic courtesies (“please,” “thank you,” “excuse me”), and respecting the feelings of others. A section at the back of the book, in both English and Spanish, provides questions for discussion, scenarios, and role-play...