Las ballenas

Introduces the many levels of government leadership in the United States and discusses the presidency, Congress, state and local governments, and the judiciary.

¿Sabías que la forma tubular del submarino lo ayuda a moverse más rápido por el agua? Los tanques de lastre lo ayudan a hundirse o flotar. Aprende más datos fascinantes en Los submarinos, uno de los libros de Máquinas militares poderosas.

Narwhals are often called the "unicorns of the sea." But these fascinating creatures are members of the whale family. Read all about narwhals as you practice addition. This Spanish math book combines math and reading skills and uses real-life examples of problem solving to teach subject-area content. The dynamic images, detailed sidebars, practice problems, and math diagrams make learning addition easy and fun. Text features include a table of contents, a glossary, an index, and captions to build vocabulary and increase understanding of math and reading concepts. An in-depth problem-solving...

For societies to function successfully, they need rules and laws for their members to follow. This book takes an in-depth look at the way laws and rules influence society and how people can have an impact on the laws that govern them. Different types of societies are discussed, and a brief overview of how rules and laws are created in the United States is provided. Students will gain an appreciation for the rules and laws of the various societies they belong to after reading this informative and insightful book.