¿Por qué hibernan los animales? (Why Animals Hibernate)

The rock cycle has been taking place for millions of years. However, geologists have only known about this phenomenon for about 300 years. Young terrestrial explorers are introduced to different types of rocks, where in the cycle these rocks fit, and where in Earth's layers each step takes place. Fact boxes provide readers with fun additional information. A diagram helps readers make sense of the new information they're learning.

Diamonds and salt are both minerals, but diamonds are more rare than salt. Curious readers will learn what physical and chemical conditions must be present for minerals to form. They'll discover how minerals are identified and how they are used in daily life. Informative and interesting text presents readers with this science content in a fun way. A graphic organizer shows how different minerals are identified and fact boxes provide readers with exciting supplementary information.

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...

In this Spanish title, learn about what makes endangered jungle animals so unique and why they need to be protected.

Ideal for English language learners, this Spanish-language series provides a lively first look at people and countries around the world. The simple text is supported by large, colorful photos. Titles feature an overview of each country's people, land, weather, homes, food, and lifestyle.

Simple text and color photographs show what life is like on a ranch, covering cattle, corrals, roundups, and other topics.