La carta de derechos

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

This book introduces readers to what it means to celebrate Divali, and shows them why this holiday is special.

Farmers use tractors to plow their fields. Tractors are also used on construction sites. The biggest tractors are as wide as a road. Learn more about these machines in Tractors, an AV2 media enhanced book

Nosotros, el pueblo de Who HQ, traemos a los lectores la historia completa (argumentos y todo) de cómo surgió la Constitución de los Estados Unidos. We the people at Who HQ bring readers the full story--arguments and all--of how the United States Constitution came into being in this Spanish entry in the WHO HQ series. Firmada el 17 de septiembre de 1787, cuatro años después de la Guerra de la Independencia, la Constitución estableció la ley suprema de los Estados Unidos de América. Hoy es fácil que demos por sentado este proyecto de gobierno. Pero los legisladores (cincuenta y cinco...

Colorful photographs and English and Spanish text teach children some of the many things different animals can do, from fly and swim to eat and do tricks. On board pages.