Hoy no hay palomitas

The need for speed is the motivating factor in this engaging, Spanish book. Readers learn the history of travel from the very slow to the supersonic and beyond, including everything in between. They learn and discover the factors that influence motion for all types of vehicles: land, air, and water alike. They also learn different ways to measure speed and read about energy uses for different vehicles. With greater speed comes greater risk. Readers learn how engineers are always seeking new and better ways to keep people safe as they travel faster and go farther.

«Vivimos en este planeta como si tuviéramos otro, y olvidamos que la tierra no nos pertenece: nosotros le pertenecemos a ella. Somos hijos de la tierra, y la tierra confía en nosotros.» Estamos en un momento único en la historia. Y este libro, cuyas palabras brotan de las voces de Jane Goodall, Jacques-Yves Cousteau, David Attenborough, Greta Thunberg o Félix Rodríguez de la Fuente, nos recuerda que debemos cuidar y amar nuestro hogar, porque de esto depende nuestro futuro.

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.

Life Long Ago brings ancient civilizations to life and reinforces important early elementary social studies standards such as time, continuity, and change. Students will learn what daily life was like, how ancient peoples governed themselves, how they communicated, and how the influences of ancient cultures are still felt today.