The MarZy 2. Sobreviviendo en una base secreta

Surveys the life of the American statesman, lawmaker, writer of the Federalist Papers, and first secretary of treasury under George Washington.

Las acciones que implican el cierre de escuelas rurales con baja matrícula para forzar los alumnos a movilizarse a centros educativos de mayor tamaño no son nuevas. Iniciaron en Estados Unidos desde finales del siglo XIX y desde entonces se han aplicado con diversos grados de intensidad en muchas naciones a través de varias modalidades. Aunque estas acciones se han sostenido con el argumento de que las pequeñas escuelas son de baja calidad, en el fondo estas medidas se apoyan en criterios meramente económicos: es más barato para el Estado sostener escuelas de mayor tamaño que varios...

A soldier, a farmer, a governor, and an explorer, Juan Ponce de León made his very first voyage with the famed Christopher Columbus. As an explorer, Ponce de León may be better known for what he didn't discover the fabled fountain of youth than for what he did discover Florida!

The sun is responsible for all life on Earth, but what exactly is it? Our star is an amazing force that can be as dangerous as it is important. From solar flares to the threat of blowing up altogether, the sun is one of the most interesting things in our solar system. Readers take a trip to the sun to see how it works and exactly what it is made of. Theyll learn about the life cycle of a star and see just how long we have until we have to find a new planet to call home. Dont worry, theyll be happy to learn that (hopefully) we have millions of years left!