Arroyo claro, fuente serena

La brillante y conmovedora historia del pueblo estadounidense para lectores de escuela intermedia y secundaria, ahora revisada y actualizada para el centenario del nacimiento de Howard Zinn. La historia del pueblo de Estados Unidos para jóvenes cuenta las historias de obreros, personas esclavizadas, inmigrantes, mujeres, personas negras, latinoamericanos, asiaticoestadounidenses, indígenas estadounidenses y otros que comúnmente son excluidos de libros de texto pero que constituyen parte de la fuerza impulsora de la historia de nuestra nación. Comenzando con un vistazo a la llegada de...

Germs. Everybody has them! Some germs help people. Some germs can harm people. Add and subtract with tens as you learn all about germs. This Spanish math book combines math and reading skills and uses real-life examples of problem solving to teach subject-area content. The dynamic images, detailed sidebars, practice problems, and math diagrams make learning arithmetic easy and fun. Text features include a table of contents, a glossary, an index, and captions to build vocabulary and increase understanding of math and reading concepts. An in-depth problem-solving section provides additional...

Provides examples of animals and things in motion to demonstrate the concept of up and down. Presented in English and Spanish.

Dams change the landscape, providing reservoirs of freshwater and even producing electricity. Discover the engineering behind dams.