Criptología digital (Digital Cryptology)

Geografía General, Un enfoque interactivo para bachilleres de los autores Héctor Israel Ramírez Torres, Flor Araceli Ruiz Peña, Mónica Chaparro Esquivel, Rafael Antonio Olmos Bolaños y Leticia Gerónimo Mendoza, se propone desarrollar una metodología apoyada en competencias, interactiva y atractiva para los jóvenes. Los autores desarrollan 8 unidades con un enfoque metodológico que busca la construcción activa del aprendizaje mediante textos, apoyos visuales (fotografías, esquemas, gráficas, cuadros y 42 mapas), y diversas secciones: Y todo esto… ¿para qué?, Conozco y aprendo, ...

Ser cortés, tener buenos modales, y mostrar bondad a los demás es el tema de este libro. Da a diferentes situaciones y circunstancias en las que la cortesía es importante.

Readers may never expect that they might free fall to Earth, but if they have ever dived into a pool, that's exactly what they've done. This book shows readers how Newton's three laws of motion affect divers, skydivers, and mountain climbers' movements. Readers discover who uses gravity, and who works against it, and all other forces that contribute to a successful dive or climb. After reading this book, readers can decide if they will ever be interested in engaging in one of these extreme sports.

Martín De León was the only Mexican empresario to found a colony in Texas. This book also details De León’s integral role in the development of the cattle industry, along with other accomplishments that have made him a compelling figure in Texas history.