El Pacto Del Mayflower /

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

Provides The History Of Biofuels, Different Uses, Positive And Negative Characteristics, And How They Will Impact The Future.

Follows The Thirteenth Amendment That Freed The Slaves, The End Of The War, And The Death Of President Abraham Lincoln.

A simple biography of the naturalist who founded the Sierra Club and was influential in establishing the national park system.

Oil spills have a serious impact on the environment, killing countless wildlife, destroying important habitats, and polluting our water. Readers follow a group of volunteers as they learn about what oil spills do to our environment, what measures can be taken to clean up after oil spills, and ways to prevent future spills from happening.

Nuestra historia comienza en el año 1451, hace más de 500 años. En ese momento no se conocían todos los países y continentes que hoy conocemos. Por ejemplo, aún no se había descubierto el continente de América. Esta es nuestra historia: cómo un hombre y una nación descubrieron un nuevo continente para todos. Una historia fascinante…. ¿nos acompañas? Un cuento ilustrado para niños de 7 a 12 años, donde se relata de forma divertida el descubrimiento de América. Una forma para que los más pequeños de la casa comiencen a entender los acontecimientos más importantes de la...

A force is a push, a pull, or a turn. Every force has an equal and opposite force. Forces are always with you! They are all around us. Learn about forces with this Spanish science reader that features easy-to-read text. Nonfiction text features include a glossary, index, and detailed images to facilitate close reading and help students connect back to the text. Aligned to state and national standards, the book also includes a fun and engaging science experiment to develop critical thinking and help students practice what they have learned.

Winning the American Revolution was just the first step. After defeating Great Britain, the American colonies were united in name only. How would this independent nation be governed? During the summer of 1787, representatives went to Philadelphia to solve the problem. The result, the U.S. Constitution, created a new government, establishing the foundations of a free nation and setting a new course for history.