Lewis y Clark y la compra de la Luisiana (Lewis and Clark and Exploring the Louisiana Purchase)

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.

Un libro claro, riguroso y estructurado, adaptado a los contenidos curriculares de Biología y Geología, acompañado de un elevado número de actividades teóricas, prácticas, competenciales e interactivas. Son piezas clave del libro: el enfoque TIC, con vínculos a animaciones y a actividades interactivas y el planteamiento encaminado al desarrollo de las competencias básicas.Incluye como anexos un diccionario científico y un atlas anatómico, de gran utilidad tanto en el aula como para el uso autónomo de los alumnos.

Desmond Tutu cuenta más de cincuenta de sus relatos bíblicos favoritos, destacando artísticamente el deseo de Dios de que todos los seres humanos se amen unos a otros y hallen la paz y el perdón en su corazón.

"Dino" Don Lessem brings readers face-to-face with various dinosaur species, detailing their habitats, way of life and how they became extinct. An acclaimed dinosaur expert, Don Lessem has written more than 30 children's books, writes a popular dinosaur column in Highlights magazine, and was an adviser for Jurassic Park. Take a trip through dinosaur time to meet these feathered dinosaurs face to face: The Caudipteryx had feathered arms and a tail that looked like a pom-pom! The Sinovenator may have used colorful feathers to attract a mate! The Microraptor may have used its feathers to glide...