La proclama de emancipacion

Defines levers, explains their functions, and suggests simple experiments to demonstrate how they work.

Follows the Thirteen the Amendment that freed the slaves, end of the war, and the death of President Abraham Lincoln.

Define planos inclinados, explica sus funciones, y sugiere experimentos sencillos para demostrar cómo funcionan.

This book discusses the training of ice hockey players, including warming up by skating backwards, hitting a slap shot, passing the puck back and forth, and more.

Juro lealtad a la bandera (I Pledge Allegiance to the Flag) teaches students about the Pledge of Allegiance. This book uses intriguing primary source images and documents and simple sentences to engage students in reading as they build their social studies content knowledge. For use in the classroom or at home, this Spanish book includes a simple glossary, captions and an index to introduce informational text features to young readers and provide additional reading support.

"Some things are so huge or so old that it's hard to wrap your mind around them. But what if we took these big, hard-to-imagine objects and events and compared them to things we can see, feel and touch? Instantly, we'd see our world in a whole new way." So begins this endlessly intriguing guide to better understanding all those really big ideas and numbers children come across on a regular basis. Author David J. Smith has found clever devices to scale down everything from time lines (the history of Earth compressed into one year), to quantities (all the wealth in the world divided into one...

Los temas sobre la energía -producción, uso, impacto ambiental.- forman parte de nuestra vida cotidiana. Está presente en la prensa, en las cabeceras de los telediarios, en guiones cinematográficos o en la publicidad. Son contenidos vitales que no pueden esperar a la educación secundaria y su estudio debe abordarse desde los primeros niveles del sistema educativo. En este sentido este libro aporta ideas para la planificación y la puesta en práctica de actividades relacionadas con la energía, su uso, consumo y ahorro energético en la vida cotidiana. Se trata de propuestas y materiales ...