Nathan Hale

Introducing chemical and biological concepts, this book explains what occurs in the body when a person plays, trains, or participates in an athletic event and allows the reader to understand that sports are not only a question of muscles, but of lungs, bones, chemical reactions, intelligence, and, naturally, a lot of heart.

Cada animal cría a sus hijos de acuerdo a su instinto. Este libro da cuenta de ello en una variada selección de animales que va desde los pingüinos hasta los guanacos, de los monos a las ballenas. En muchas y diferentes formas de crianza, la naturaleza nos enseña que en la diversidad está el secreto de la vida. Each animal raises its offsprings according to their instinct. This book gives an account of this in a varied selection of animals ranging from penguins to guanacos, from monkeys to whales. In many different forms of parenting, nature teaches us that diversity is the secret of...

Navigation instruments have changed over time. Lodestones, sunstones, and sextants helped early navigators find their way. Modern technology makes navigation more precise than it has ever been. But the roots of navigation still remain. Created in collaboration with the Smithsonian Institution, this Smithsonian Informational Text builds students' reading skills while engaging their curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides students through every step of the engineering design process and is perfect for makerspace activities. It ...

Highlights the life and political career of the forty-fourth president of the United States who, after years of struggling with his identity and place in society, found his niche in public service and made history as the first African American U.S. President ever to be elected.