¿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.

An illustrated survey of the history and customs of the native North Americans who were members of hundreds of different tribes with varying lifestyles over the centuries.

Malala Yousafzai casi perdió la vida por querer ir a la escuela. Ella nació en el valle de Swat, en Pakistán, una región de extraordinaria belleza, codiciada en el pasado por conquistadores como Gengis Kan y Alejandro Magno y protegida por los bravos guerreros pastunes, los pueblos de las montañas. Fue habitada por reyes y reinas, príncipes y princesas, como en los cuentos de hadas. Malala creció entre los pasillos de la escuela de su padre, Ziauddin Yousafzai, y era una de las primeras alumnas de la clase. Cuando tenía diez años vio cómo su ciudad quedaba bajo el control de un...

What do a shark, a seahorse, and a ray have in common? They're all fish! Learn about the characteristics that all fish share.

English Spanish bilingual children's book. Perfect for kids studying English or Spanish as their second language. Little Jimmy doesn't like to brush his teeth. Even when his mother gives him a brand new orange toothbrush, his favorite color, he doesn't use it like he is supposed to. But when strange and magical things start happening to Little Jimmy, he begins to realize how important brushing his teeth can be. I love to brush my teeth is a delightful story full of beautiful illustrations sure to get your little ones attention. If your child is having difficulty learning to brush their teeth...