Obedecer las reglas

Summarizes how water changes from a solid to a liquid and back again, and introduces related facts such as that water freezes at thirty-two degrees Fahrenheit and that ice floats.

¿Qué significa migrar? Descubra qué animales migran y por qué migran a través de fotografías detalladas y texto simple. What does it mean to migrate? Discover which animals migrate and why they migrate through detailed photographs and simple text.

Bestseller del New York Times y del USAToday Una exploración oportuna y crucial del racismo y el antirracismo en Estados Unidos Este NO es un libro de historia. Este es un libro sobre el aquí y el ahora. Un libro que nos ayudará a comprender mejor por qué estamos donde estamos. Un libro sobre la raza. El concepto de raza siempre se ha utilizado para ganar y mantener el poder, para crear dinámicas que separan y silencian. Esta notable adaptación del libro Stamped from the Beginning, del Dr. Ibram X. Kendi, ganador del National Book Award, revela la historia de las ideas racistas en...

Dragonflies are large flying insects known for their brightly colored bodies and see-through wings. They are among the fastest insects in the world. Learn more about these amazing animals in Dragonflies, a Fascinating Insects book.

Había una vez un gorrión muy preocupado. Todas las demás aves levantaban la vista para mirar el magnífico cielo azul y cantaban de alegría; pero no el gorrión muy preocupado. Él solo se preocupaba. Le preocupaba volar, le preocupaba que le faltara comida, le preocupaba encontrar una pareja y construir un nido... ¡y sobre todo le preocupaba el terrible gavilán!Hasta que descubrió algo muy importante.There was once a Very Worried Sparrow. All the other birds looked up at the bright blue sky and sang for joy. But not the Very Worried Sparrow. He just worried. He worried about flying,...

Ignacio Zaragoza Seguin was born in Goliad, Texas, in 1829, when Texas was part of Mexico. His family lived on a Mexican fort because his father was a soldier in the army. Ignacio wanted to be a just like his father! When he was seven, Texas became independent from Mexico, and the family had to move to Matamoros, Mexico. Later they moved to Monterrey. Ignacio tried to join the Mexican army in 1846 when the United States declared war, but he was too young. He was finally able to join the armed forces when he turned 24. An outstanding soldier, he was named the commander of the Mexican army and...