Barcelona XXI siglos

The man who saved the lives of his PT-109 crewmen during WWII and became the 35th president fought-and won-his first battle at the age of two-and-a-half, when he was stricken with scarlet fever. Although his presidency was cut short, our nation¿s youngest elected leader left an indelible mark on the American consciousness and now is profiled in our Who Was¿? series. Included are 100 black-and-white illustrations as well as a timeline that guides readers through this eventful period in history.

Presenta varios experimentos en cronometría. Para estudiantes de primaria (grados 4-6) y de secundaria (grados 7-9).

Bruno Munari reflexiona en este libro sobre el diseño como culminación de procesos. El recorrido que efectúa el diseñador desde que se enfrenta con un problema funcional hasta la proyectación y configuración de su solución material, se analiza de una manera sistemática, discutiendo y clarificando cada paso, hasta el punto de que los así enlazados se convierten en el claro camino que conduce hacia la comprensión de lo que es el diseño en su esencia. .

Oceans cover 70 percent of the Earth's surface, providing students with a variety of plant and animal life to learn about. An ocean biome includes the saltwater below the waves and everything on, above, and near the surface. Students will also learn about the beach, tides, cliffs, bays, coastlines, coral reefs, and tide pools in this Spanish-translated title.