La historia de los sistemas numéricos: Valor posicional (The History of Number Systems: Place Value)

Edgar Sawtelle es un niño mudo que se comunica solo en lengua de signos. Lleva una vida apacible y feliz junto a sus padres y su inseparable amiga y aliada perra. Pero el inesperado retorno de Claude, el hermano del padre de Edgar, a la granja después de muchos años, romperá la tranquila y feliz vida de esta familia y cambiará su destino, de forma irreversible, para siempre.

Este libro regala a cada lector la posibilidad de vivir una vida extraordinaria fundamentada en una realidad interna llena de belleza espiritual. Con 22 consejos para embellecer tu carácter, Valeria Leys te llevará de manera clara a tomar decisiones prácticas que cambiaran tu realidad interna de manera que tu persona, tus actitudes y decisiones puedan reflejar toda tu belleza interior.

Early elementary readers find out what causes earthquakes and what to do to stay safe if one occurs in this helpful, Spanish-translated nonfiction title. Featuring informational text, colorful maps, diagrams, and vibrant photos, this book keeps children engaged and fascinated at the same time! This 6-Pack includes six copies of this title and a lesson plan.

Rabbit burrows play an important part in the life of a rabbit. A burrow provides a place to live, a place to raise baby rabbits, and a place to stay safe from predators. This volume, which was written to support elementary science curricula, examines the role a burrow plays in the survival of a warren, and how that in turn helps rabbits contribute to ecosystems around the world. The text’s age-appropriate, science-rich content focuses on rabbit behavior and encourages readers to draw connections between what they learn in science class and what they see outside. This text is complemented by ...