Atlas de los indios norteamericanos

Our closest solar system is about 10 light years away. It has two main types of planets. Some are rocky and small, like planet Earth, while others are huge balls of gas, like Jupiter. Learn about how astronomers once thought our solar system was the one and only, to how they have now discovered hundreds of stars with planets orbiting them, which means there could be billions of solar systems in outer space! Just maybe, these alien worlds could host life, like our own amazing planet. This book allows students to use observations of the Sun, moon, and stars to describe patterns that can be...

Nuevos récords alucinantes cobran vida. Un excelente y regalo para divertirse aprender. Vuelve el libro de los récords con nuevas y alucinantes hazañas. Totalmente actualizado, con nuevo diseño de cubierta ¡y con más de 1.000 nuevas fotos! Acércate peligrosamente al mayor dinosaurio carnívoro de todos los tiempos. Diviértete con el balón de fútbol más grande del mundo. Conoce al robot andante más grande. Descubre las criaturas más venenosas de la Tierra. Y además… ¡Descárgate gratis la nueva aplicación de realidad aumentada para ver cómo los récords emergen del libro en...

Engineers have built some incredible things. But with every new feat, there is failure. Readers will learn about engineering feats like the Titanic, the Hindenburg, the Hoover Dam, and more in this engaging nonfiction title that has been translated into Spanish. This title features brilliant images, charts, and intriguing facts in conjunction with informational text and mathematic skills to keep readers active and engaged.

This book is a comprehensive, practical presentation of the principles of behavior modification and guidelines for their application. It teaches forms of behavior modification ranging from helping children learn necessary life skills to training pets, to solving personal behavior problems.