¿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.

Written specifically for teenage parents who must blend their own needs as adolescents with the tremendous needs of their children, this book advocates gentle teaching rather than the harsh punishment too often utilized by many parents. Teen parents and former teen parents share their viewpoints on such issues as spanking, disciplining a child while living with one’s own parents, toilet training, and other topics of concern during a child’s first three years. Escrito especificamente para padres jóvenes que deben balancear sus necesidades como adolecentes con las de sus hijos, este libro...

Tailored to the Language B syllabus, our full-colour IB coursebook, Mañana, contains everything you need for your two-year teaching course.

Mi nombre es Pla y soy una niña de 11 años que tengo como misión de vida cuidar el planeta, pues la naturaleza se está acabando. Cada vez es menos «natural» y más «humana». Pienso que llevar una vida sustentable es respetar la Tierra y a quienes nos rodean. Si lo hacemos, nos servirá para que los recursos duren más y podamos vivir de la mejor forma posible. Si cuidamos los recursos, el planeta logrará sanarse y bajará la temperatura que ha aumentado en las últimas décadas. Si bien los adultos toman muchas decisiones, ¡tú también puedes hacer lo tuyo y decidir vivir de mejor...

The combination of violins, trumpets, sombreros, and song possesses the power to not only lighten the heart but weigh it down as well. This book journeys to the time and place where mariachi music originated and reveals the various musical traditions that combined to form the richest, most popular, and most highly regarded tradition of Mexico. La combinación de violines, trompetas, sombreros y canciones capaces de desgarrar o alegrar el corazón de cualquiera, mexicano o extranjero. Este libro viaja a través del tiempo y las regiones donde se originó el mariachi y descubre las distintas...