Grandes Maquinas

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.

La conjugación alcohol y adolescencia es una preocupación constante que aparece cíclicamente en el interés social. En algunas ocasiones se visibiliza como un problema de orden público, en otros se acentúa como un problema educativo, en otras ocasiones coge fuerza la visión de salud pública. Todas son ciertas, pero parciales e incompletas si no se aúnan todas las visiones en una interpretación más omnicomprensiva del fenómeno del consumo de alcohol juvenil. Ello es especialmente necesario cuando se trata de buscar soluciones o programas preventivos de impacto en la población...

Who wants new pants? Not this little boy! He wants to keep his old, worn, torn, too-small pants. His mom does not agree.

Read Along or Enhanced eBook: Encourage readers to discover which foods are healthy for them and how to make the best food choices with this Spanish-translated nonfiction title. Featuring helpful charts and diagrams, interesting facts, informational text, and vibrant, detailed photos, readers are introduced to important concepts such as main food groups, proteins, carbohydrates, fiber, the recommended daily amounts, food allergies, and health concerns. With supportive and helpful language, readers are encouraged to make healthy eating choices to help keep them active, energetic, and strong.