Contar Leones

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.

In Zoe's and Joey's family, their dad's famous chocolate chip cookies are a family tradition. But when they try to stock up on chocolate chips, they're shocked to discover no chocolate on the shelves. What has happened to all the chocolate? And will the family adapt be able to adapt to a world without chocolate? With full-color illustrations and a short chapter format, this 32-page hi-lo book will capture the interest of reluctant readers who enjoy realistic fiction stories with elements of dystopia and science.

La experimentación es la base de la ciencia, esencial para llegar a comprender por qué y cómo pasan las cosas. La propuesta de experimentos de este libro permite iniciarte en el mundo de la experimentación científica en los campos de la electricidad y magnetismo, el aire, la densidad de los cuerpos, fuerzas y presiones, y el calor. Cada experimento se estructura de una forma similar que responde a cuatro preguntas: ¿Qué queremos demostrar? ¿Qué necesitamos? ¿Cómo lo hacemos? ¿Por qué y qué ha pasado?, y requieren de material sencillo y al alcance de todo el mundo. .

This book's attractive combination of excellent color photographs and detailed illustrations will captivate young readers and hold their attention as they learn all about the animal kingdom. The child-friendly text highlights details that children are especially interested in to provide a thorough introduction to the major animal and insect groups. Text copyright 2004 Lectorum Publications, Inc.