La optimización mecánica en el medio acuático

We love our pets. And our pets love us. Animals need lots of care. This engaging Spanish book teaches beginning readers how to take care of pets. Engage students in reading as they develop their early childhood literacy skills. With TIME For Kids content, this full-color book is aligned to state and national standards, and introduces students to simple informational text features.

Hercules, son of the god Zeus and a mortal woman, renowned for his great strength, performs twelve dangerous tasks to atone for an attack on his wife and children.

"Tengo derecho a expresarme" examina el derecho de todos los niños a expresar su opinión y a tomar partida en aquello que afecte a sus vidas, dondequiera que vivan y ya sean pobres, no tengan hogar, sean discapacitados o deban trabajar para sobrevivir. Examina los obstáculos que a veces los niños tienen que superar para lograr este derecho.

A land of extremes, from active volcanic peaks to dense rain forests, Guatemala has sustained great civilizations and attracted foreign conquerors. While shadows of its vicious, decades-long civil war still linger, Guatemala's people work toward peace and stability in the face of corruption and impunity. Illuminating photographs, insightful facts, and informative sidebars help the reader discover what it's like to live in today's Guatemala, its ancient beginnings, dramatic landscape, rich culture, resilient people, and more.