¡Cuenta conmigo! La feria de la escuela

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.

The need for speed is the motivating factor in this engaging, Spanish book. Readers learn the history of travel from the very slow to the supersonic and beyond, including everything in between. They learn and discover the factors that influence motion for all types of vehicles: land, air, and water alike. They also learn different ways to measure speed and read about energy uses for different vehicles. With greater speed comes greater risk. Readers learn how engineers are always seeking new and better ways to keep people safe as they travel faster and go farther. This 6-Pack includes six...

Readers won't have to disassemble their favorite toys to discover what makes them work. This book explores electric, magnetic, and motion-powered toys from design to function. It introduces readers to the six simple machines and explains how they use force and motion to do work. Not every toy is a technological marvel. Readers learn about time-honored favorites including the rocking horse, Slinky, and rattles.

Looks at the life of Betsy Ross from her Quaker childhood to her days as an independent businesswoman. Also examines the legend of the Betsy Ross flag. Written in graphic-novel format.

The sordid, thrilling, and comic story of two young lovers--affluent Lala and impoverished Guayi; examines the economic and social circumstances of Argentina and Paraguay to make sense of the characters' past choices and present misfortunes.

Alegría, amor, euforia, celos, enojos, vergüenza, miedo... son tan solo algunos de los estados de ánimo que puedes sentir en un mismo día, ¡o en apenas horas! Este libro te ayudará a comprender y aceptar estos cambios que suceden entre la niñez y la adultez. Con divertidos test y muchas emociones para expresar. ¡Un libro a la medida de tus emociones!

Esta obra, recoge once ensayos cuyo denominador común es el abordaje de pasajes de la historia intelectual del siglo XX mexicano. Por sus páginas, el lector verá transitar a multitud de intelectuales, desde Justo Sierra y Ezequiel Chávez hasta José Emilio Pacheco, pasando por Félix Palavicini, José Vasconcelos, Martín Luis Guzmán, Daniel Cosío Villegas y Carlos Fuentes, entre muchos más, con una atención especial en Alfonso Reyes y en la presencia de los intelectuales españoles exiliados en nuestro país a partir de finales de los años treinta. Su lectura llevará también al...