Trayectoria de choque: Los asteroides y la Tierra (Collision Course: Asteroids and Earth)

La naturaleza está llena de innumerables criaturas salvajes, extrañas y maravillosas, de todas las formas y especies. Cada animal se ha adaptado para sobrevivir en su entorno particular. Cada ser vivo desempeña una función única e importante en nuestro planeta. Sorpréndete con esta divertida recopilación de los animales más inútiles (¿o no?) del mundo.

When many think of the Constitution, they think of the Founding Fathers: Thomas Jefferson, John Adams, Benjamin Franklin...but neither Jefferson nor Adams even signed it. Facts like this will surprise readers, while further information will enlighten them about both the crucial document called the U.S. Constitution as well as about its creation and ratification. This essential volume is a significant addition to any elementary social studies collection.

Rosalinde tiene un agujero en los calcetines. Rosalinde tiene una venda en la rodilla... Las personas que la rodean se fijan en casi todas las cosas de Rosalinde, menos en sus ideas. Sólo su abuelo conoce las ideas que tiene en la cabeza.

In what ways are the branches of government like a basketball game? How can a school yard game's rules liken themselves to a constitution? Through engaging analogies and introductions, our new Spanish-language government series gets English language learners ready for election 2008. Correlated to the fourth and fifth grade social studies curriculum, My American Government introduces students to how our government works. Students learn about the U.S. Constitution, the branches of government, citizens' basic rights, and how we elect our leaders.