La optimización mecánica en el medio acuático

Germs. Everybody has them! Some germs help people. Some germs can harm people. Add and subtract with tens as you learn all about germs. 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 arithmetic 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 additional...

Tres inquietos de la Italia del siglo XV Piero Migliacci, Francesco y Selena- emprenderán, sin pretenderlo, la aventura más apasionante de su vida gracias a que conocerán a un misterioso y extraño ser: el viejo Hermes. El anciano maestro llegará de manera imprevista hasta la bella ciudad de Florencia lugar donde se desenvolverá la trama-, y a pesar de no gozar de muy buena fama entre sus vecinos, el octogenario “visitante” sabrá conquistar la amistad de los jóvenes amigos llegando hasta lo más profundo de sus corazones y sometiéndolos a una suerte de pruebas que habrán de ser...

Learn how to help others in your community. This exciting Spanish nonfiction book describes the many ways that volunteers make a difference, from cleaning up parks to helping in food banks. Perfect for young readers, the book includes a short fiction stor

Farmers use tractors to plow their fields. Tractors are also used on construction sites. The biggest tractors are as wide as a road. Learn more about these machines in Tractors, an AV2 media enhanced book