Diseño y construcción en la tierra

Introduce students to immigration in America in the 1800s, and how it affected the United States. With this Spanish-translated book, readers will discover topics such as Ellis Island, Angel Island, and assimilation. Primary source images, fascinating facts, a glossary, and other features keep students engaged and help them better understand the social studies content.

This Title Explains What An Ecosystem Is And How The Plants And Animals Within An Ecosystem Rely On And Effect Its Existence. Different Types Of Ecosystems Are Described, As Well As The Food Webs Within Them. How Some Changes To An Ecosystem Can Be Good And How Some Harmful Changes Can Destroy Them. Teaches Students What An Important Role They Can Play In Keeping These Intricate Ecosystems Alive.

Mars is perhaps the most thrilling planet these days. With rovers exploring its surface and manned missions in the works, people are wondering if Mars is our next home! In this highinterest book, readers will learn more about Earth's neighbor, including what its climate and surface are like, why it's called the Red Planet, and about the recent discovery of water on its surface. They'll learn all this while solving "Your Mission" math problems that complement and support the text. This motivating volume is an engaging way to explore key aspects of science and math curricula.

Nuestra misión: que las matemáticas sean una parte divertida en la vida de los niños. Leer cuentos a los niños antes de dormir es maravilloso, pero ¿qué pasa con las matemáticas? Mucha gente no se siente cómoda con las matemáticas y los números, y con frecuencia oímos el "¡Es que no se me dan bien!". Esta actitud se ha ido pasando de padres a hijos durante décadas, y ahora, en nuestra cultura, se piensa que las matemáticas son difíciles, intimidantes y nada divertidas. Matemáticas antes de dormir quiere cambiar eso. Dentro de este libro hay problemas de matemáticas divertidos ...