Un pajarillo canta

Partiendo del principio de que “lo que no se entrena no se juega” este libro presenta un entrenamiento específico para el puesto de portero. La obra trata desde los aspectos psicológicos hasta las aptitudes, actitudes y gestos técnicos que se deben trabajar en el entrenamiento de los porteros de fútbol base. Se presentan 200 ejercicios prácticos con gráficos explicativos que se han agrupado según los aspectos que más se ejercitan en ellos: calentamiento, abdominales y estiramientos, velocidad, potenciación del salto, salidas, acciones ofensivas, lanzamientos a puerta. También se ...

What do solar panels, waterproof clothing, and window coverings have in common? They are technologies that have been adapted based on studying butterflies! Learn what scientists have learned from butterflies with this Spanish book that will ignite a curiosity about STEAM topics through real-world examples. Created in collaboration with the Smithsonian Institution, this STEAM book features a hands-on STEAM challenge that is perfect for makerspaces and that guides students step-by-step through the engineering design process. Make STEAM career connections with career advice from actual...

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

As a land that’s constantly in flux, Earth sometimes reveals clues about the plants, animals, and other organisms that lived long ago. Fossils teach us much about what life was like millions of years ago, answering the questions of how Earth changed and maybe even why it changed. This essential Earth science topic is thoroughly explained through manageable text, fact boxes, informational charts and diagrams, and a glossary and index. Readers will become young Earth detectives by the time they’re through with this text!