Un día en el zoológico (Day at the Zoo) (Spanish Version)

A community center has many exciting activities to choose from. You can play games, swim, and even learn how to cook there. As you read, you can compare the size of a tennis racket to a ping pong racket, use cubes to measure the world's smallest snake, and even use feet to measure the length of a basketball court. What would you use to measure a snake?

There is a contest at a school to design a new playground. The students use blocks to build their models. As they build, they use three-dimensional shapes. Some students build a train out of blocks for the younger students to play on. Can you guess which three-dimensional shape they use for the train's wheels? Read to find out which design wins.

William Ellsworth Hoy amaba el beisbol sobre todo lo demás. Cuando le dijeron que era muy pequeño para el equipo de su escuela, no dejó que nada lo detuviera, ¡ practicó hasta ser lo suficientemente bueno como para jugar en las grandes ligas! Ser sordo en las grandes ligas no fue fácil, ya que poca gente usaba el lenguaje de señas en la década de 1880. A William se le dificultaba leer los labios en el campo de juego y algunos jugadores lo intentaban confundir. Pero tampoco dejó que eso lo detuviera. ¡William les enseñó a los ampáyeres a hacer señas de mano para que pudiera ver...

Una cuidadosa selección de lo mejor de nuestros poetas compone esta antología de poesía iberoamericana que es una primera aproximación a la sencillez de la música y el ritmo y al hermoso lenguaje de las imágenes que se esconden en un verso.

The United States grew rapidly from the time of the Louisiana Purchase to the building of the Transcontinental Railroad. All of this expansion came at the expense of Native American populations that had either lived in the region for centuries or been forced there from ancestral homes in the East. Tribes memorably fought on their own and together in an doomed effort to retain the land and a lifestyle that had long sustained their families. This book outlines some of the major conflicts of the Westward Expansion, and of the treaties and were signed, and often broken, by representatives of the...

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...