Globos aerostáticos (Hot Air Balloons)

This book really measures up! It provides historical background and details about how length, distance, volume, weight, and time were measured in the past. An introduction to many of the necessary terms for a better understanding of measurement, such as scale, perimeter, and ruler is provided along with detailed photos and images to help the readers better comprehend the overall concept of measurement.

En el acuario (At the Aquarium) engages students in reading about aquariums as they learn how to calculate volume. Volume helps aquarium designers figure out everything from the shapes and sizes of tanks to how much water is needed to fill them. This nonfiction Spanish text includes mathematical charts to help students practice calculations. With a glossary, an index, and easy-to-read text, students will build their math and reading skills while they are engaged in reading high-interest content.

«Hace cinco días que la nave tiene abierta una vía de agua en la popa, en la bodega las bombas de achique no responden, no se divisa la costa, la tripulación empieza a lanzar al mar parte de la carga—primero, la de los propietarios menos importantes; la pimienta nunca, ya que es propiedad del rey—, los carpinteros de a bordo se ven impotentes y ni siquiera se sienten capaces de informar de la situación a los oficiales, el contramaestre está enfermo, el piloto equivoca el rumbo, los pasajeros protestan inconscientes de lo que ocurre, empieza a llover y a soplar un fuerte viento que...

A forest is unlike any other biome on Earth. There are many life cycles found within a forest. Learn about the energy pyramid that explains the numbers of forest plants and animals. Learn about threats to these lively forests and how they thrive and survive in this Spanish-translated text!

Read Along or Enhanced eBook: Introduce readers to some of the most well-known criminals and tyrants of the past with this fascinating, Spanish-translated nonfiction book! Featuring intriguing facts and theories, colorful images, and informational text in conjunction with a glossary of terms, a bibliography, and a list of helpful websites with more information, readers will want to learn all they can about ancient history and the bad guys and gals from the past.

Who were the earliest Americans? When, how, and from where did they enter and spread across the continent? And what is their relationship to modern Native Americans? Anthropologists develop theories to answer these questions based on the evidence they discover. Their theories—and the discoveries that prove and disprove them—are highlighted in this fascinating volume, full of awe-inspiring facts and incredible breakthroughs. Readers will feel like anthropologists and archaeologists themselves as they read about bones and artifacts, and what they reveal about the ancient cultures that roamed...