La carta de derechos

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

Con el crecimiento a nivel mundial del uso de las tecnologías de la información y la comunicación, las posibilidades de interconectarse a nivel global se facilitan. Los procesos de publicación de un libro también se han transformado, por lo que se posibilita la autopublicación en las modalidades: electrónico, impreso bajo demanda y audiolibro. Es por ello, que esta obra está dirigida a ti como futuro escritor del Siglo XXI. Te ofrecemos novedosas herramientas, técnicas y estrategias, para escribir, compartir, promover y comercializar un libro, a través de las diversas modalidades...

Before Texas was part of the United States, it was a nation of its own. After gaining independence from Mexico in 1836, Texas declared itself a republic. Interesting features, including a timeline and a map, guide readers through this conflict-filled period of Texas history.

Identify three-dimensional shapes all around the world in this Spanish-translated e-Book! Figuras en nuestro mundo (Shapes in Our World) gives readers practice identifying familiar shapes like cones, cylinders, pentagons, polygons, and prisms, while familiarizing them with STEM themes and more advanced geometry concepts. Children will learn more about vertices, symmetry, and bases. With each shape, this book gives readers information about an example of the shape, be it a building, a honeycomb, or a tree trunk! With an accessible glossary, clear mathematical diagrams, practical examples, and...

Text and photographs describe common things that are orange, including goldfish, pumpkins, and tigers.