Aqui Cada Cual Con Sus Cosas

Readers will be amazed to discover that every time they climb onto bicycles and ride like the wind, they are defying gravity! This book explains the physics and history behind bicycles, skateboards, and surfboards. Readers learn what happens from the simplest movement of rolling forward to more complex tricks and stunts of jumping and spinning. Readers will never look at bikes, skateboards or surfboards the same way again.

Este libro propone un viaje alrededor del mundo a través de una serie de historias, contadas en primera persona. Los protagonistas son niños que viven en diferentes países y que ofrecen su peculiar punto de vista sobre ella. Junto a los textos de cada niño se adjuntan fotografías de sus familias, tomadas por el prestigioso fotógrafo Uwe Ommer, donde se pueden aprecian las vestimentas y las costumbres de cada país.

Describes the life and work of the scientist who was persecuted by the Inquisition for his views of the universe.

Learn the history of number systems with this engaging Spanish book! This text combines mathematics and literacy skills, and uses practical, real-world examples of problem solving to teach math and language arts content. Students will learn place value while reading about the number systems of the Egyptians and Romans, and also learn important vocabulary terms like cuneiform, binary systems, roman numerals, and more! The full-color images, math charts, and practice problems make learning math easy and fun. The table of contents, glossary, and index will further understanding of math and...