La creación de Estados Unidos a partir de las trece colonias mediante las fuentes primarias (The Making of the United States from Thirteen Colonies Through Primary Sources)

The Life Cycle of a Flower looks at the growth of a flowering plant from seed to the time it is a mature plant capable of producing new seeds. Delightful illustrations, stunning photographs and easy-to-read text help young readers.

«Hace cinco días que la nave tiene abierta una vía de agua en la popa, en la bodega las bombas de achique no responden, no se divisa la costa, la tripulación empieza a lanzar al mar parte de la carga—primero, la de los propietarios menos importantes; la pimienta nunca, ya que es propiedad del rey—, los carpinteros de a bordo se ven impotentes y ni siquiera se sienten capaces de informar de la situación a los oficiales, el contramaestre está enfermo, el piloto equivoca el rumbo, los pasajeros protestan inconscientes de lo que ocurre, empieza a llover y a soplar un fuerte viento que...

When President Thomas Jefferson bought the Louisiana Territory from cash-strapped France in 1803, he doubled the size of the United States without really knowing what he was getting. He dispatched Meriwether Lewis and William Clark and their Corps of Discovery to explore a territory that would include part or all of fifteen future states and to seek a water route to the West Coast. Westward expansion began immediately, all for the bargain price of 15 million dollars. This book richly explores this fascinating part of history.

"Simple text and color photographs introduce kinds of motion, including motion powered by wind, water, and electricity--in both English and Spanish"--