Emprender para ser libre

Learn more about the renowned British scientist, professor, and author who spent his entire career trying to answer the question: "Where did the universe come from?" Stephen Hawking was born exactly three hundred years after the death of the scientist Galileo, so maybe it was written in the stars that he would become a famous scientist in his own right. Although he was diagnosed with a neurological disease at age 21, Stephen did not let the illness define his life. Known for his groundbreaking work in physics, and identified by his wheelchair and computerized voice system, Stephen continued...

Life on Earth depends on carbon. In fact, about 18.5 percent of a human body's mass is carbon. How carbon is taking in and given off through animals' breathing, the burning of fossil fuels, and more can be shown in the model known as the carbon cycle. Though this concept can be confusing, all readers have a chance to understand this concept through the text and simple diagrams in this book. Both struggling readers and those looking for review can find the most important components and vocabulary of the carbon cycle in low-level, accessible text.

¿Cómo involucras realmente a los estudiantes en el aprendizaje de la historia? Cuando los estudiantes establecen conexiones personales con la asignatura, están mucho más motivados para aprender. Este libro en español proporciona relatos de la historia de primera mano que brindan información personal sobre los eventos históricos y se enfoca en la historia del sistema escolar de California. Con un diseño visualmente atractivo, este libro presenta texto cautivador, datos divertidos, barras laterales y líneas de tiempo que ayudan a los estudiantes a comprender los conceptos esenciales...

Chistes muy originales y entretenidos. Carlos Silveyra presenta esta colección de chistes originales y entretenidos. Muchos de ellos son sobre elefantes, algunos son sobre otras bestias y todos son muy divertidos.