El Pacto Del Mayflower /

Defines levers, explains their functions, and suggests simple experiments to demonstrate how they work.

A simple biography of the naturalist who founded the Sierra Club and was influential in establishing the national park system.

Follows The Thirteenth Amendment That Freed The Slaves, The End Of The War, And The Death Of President Abraham Lincoln.

Some of the most powerful things in the world are so tiny they can't be seen with the naked eye! Readers will be amazed at what they see when they take a glance at the world of the mini but mighty in this stunningly fascinating Spanish-translated nonfiction title that features remarkable images and graphics, informational text, index, and glossary. Through these features, readers are able to explore and discover such micros as DNA, atoms, bacteria, phytoplankton, and nanotechnology items like nano-robots and microchips!

Practice addition at the playground! This fun title, that has been translated into Spanish, uses examples from all around the playground to help children practice their addition and understand early STEM themes. Add up two blue swings and three red swings to get five swings! Add slides, rings, jump ropes, basketballs, and more! These familiar images work in conjunction with engaging "You Try It!" problems to encourage young readers to practice and improve their addition skills.

Based on the #1 New York Times Best-Selling series, this timeline of world history gives a fresh take on global events, from King Tut to Malala Yousafzai. Basada en la serie más vendida del New York Times, esta cronología de la historia mundial ofrece una nueva visión de los acontecimientos mundiales, desde el rey Tutankamón hasta Malala Yousafzai. For the first time ever, the Who Was? subjects are gathered into a single title! The Who Was? History of the World is a journey along the timeline of history, noting the birthdays of 150 people in the series and what was happening in the world...

Este libro es la bienvenida a la sociedad de los pequeños ciudadanos. Con él podrán descubrir cómo funciona nuestro país, cuáles son los mecanismos y su rol en la sociedad. Será su primer acercamiento al Congreso, los Tribunales de Justicia y La Moneda. En Yo, ciudadano, niños y jóvenes comprenderán su rol en la sociedad como seres cívicos y políticos. Aprenderán de política y a debatir en torno a las causas que les parezcan justas. ¡Podrán entender el mundo, la sociedad y nuestra historia a fin de ser los mejores ciudadanos del siglo XXI!