Trayectoria de choque: Los asteroides y la Tierra (Collision Course: Asteroids and Earth)

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.

A 2014 survey by the Substance Abuse and Mental Health Services Administration showed that 8.7 million youths ages twelve to twenty reported drinking alcohol beyond “just a few sips” in the previous month. Those who start drinking before age fifteen are five times more likely to become dependent on alcohol than those who begin at twenty-one. This resource shows young people how to help a friend who is abusing alcohol. It arms them with facts about alcohol, how it affects the teen mind and body, how to look for signs of a problem, and how to bring others on board to help.

¿Qué es ese zumbido? ¡Es una abeja! Con imágenes hermosas, divertidas y auténticas, y un texto comprensible, los niños aprenderán sobre estos increíbles insectos con este libro de nivel 2. Esta serie educativa de libros para principiantes de alto interés para niños está llena de las imágenes maravillosas de National Geographic, acompañadas por textos escritos por autores experimentados en el campo de la literatura juvenil. La contratapa de la edición en rústica incluye una experiencia interactiva basada en el libro. Los libros de nivel 1 refuerzan el contenido del libro con una ...

Computer science is all around us, at school, at home, and in the community. This book gives readers the essential tools they need to understand the computer science concept of testing. Brilliant color photographs and accessible text will engage readers and allow them to connect deeply with the concept. The computer science topic is paired with an age-appropriate curricular topic to deepen readers' learning experience and show how testing works in the real world. In this book, readers learn how to make a circuit by testing for the best conductor. This nonfiction book is paired with the...