¿Qué hacen las abejas en verano?

Los sistemas de las aeronaves han sido un tema poco estudiado en las academias de vuelo. Lo cierto es, que un piloto debe conocer a cada uno de los sistemas de su avión, antes de iniciar sus primeros vuelos. En esta obra, aprenderás todo sobre los sistemas básicos de las principales aeronaves ligeras, o de pequeño porte. Tren de aterrizaje, neumáticos, controles de vuelo, combustible, electricidad, cables y mandos de control, superficies móviles, y todos los principales sistemas que componen el equipamiento de tu aeronave. El aprendizaje de los sistemas del avión debe darse al...

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.

Get a close-up look at animals in the zoo, from appearance to behavior to babies. This series uses vivid photos to compare life in the wild and life in captivity in terms of habitat, activity, and diet.

There are one, two, three, four, five dogs to walk. But there is only one dog walker. Collect data on dogs, their leashes, and their names! 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 how to collect data 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 section provides...