Tigre dientes de sable (Smilodon)

What is the common good and how does it benefit society? This book looks at the history behind the notion of the common good, touching on ideas from several famous philosophers. Readers will then learn how the common good can be promoted through education and community. Full-color photographs and accessible language help students connect with the text and develop reading comprehension skills. Important elementary subjects from the C3 Framework for Social Studies are discussed in detail throughout this informative book.

Explains the basic science of flight, the problems of getting vehicles into the air, different types of engines, and aircraft design, and includes instructions for making aircraft models.

"Dino" Don Lessom brings readers face-to-face with various dinosaurs, detailing how they lived, raised their young, and became extinct. Maps, timelines, and colorful illustrations and photographs will capture kids' attention. A dinosaur expert, Don Lessem has written more than 30 children's books.

Luna deberá prepararse para la Competencia Intercontinental de Patinaje junto con sus amigos del Jam & Roller. Pero, para cumplir sus sueños, tendrá que resolver problemas escolares, sentimientos complicados y algunos malos entendidos... Luna está más confundida que nunca, dividida entre la escuela y la pista, entre Simón y Matteo. ¿Logrará escuchar a su corazón, pasar el año y triunfar en la competencia?