Cobayos

Molecules and atoms can take the form of a solid, a liquid, or a gas. Each state of matter has its own properties. Together, these three states of matter make up most everything in the universe! Learn all about mixtures and solutions with this Spanish science reader that brings the power of science and informational text to students at a level they can understand. Introduce students to STEM topics and new concepts and vocabulary terms like solvent, polarity, compound, and solubility with this nonfiction book that is aligned to state and national standards. The leveled text supports students...

Winning the American Revolution was just the first step. After defeating Great Britain, the American colonies were united in name only. How would this independent nation be governed? During the summer of 1787, representatives went to Philadelphia to solve the problem. The result, the U.S. Constitution, created a new government, establishing the foundations of a free nation and setting a new course for history.

In the middle of the 1830s, Texans fought against the Mexican government for its independence. During the Texas Revolution, many leaders emerged, such as Sam Houston, Lorenzo de Zavala, William Travis, Francita Alavez, Sidney Sherman, Susanna Dickinson, James Bowie, and Juan Seguín. This captivating biography has been translated into Spanish and allows readers to learn about the incredible accomplishments of these people and what they did to make an impact on the Texas Revolution. Featuring alluring images, engaging facts and sidebars, supportive text, and a glossary and index, this book...

Las matemáticas en la vida cotidiana de los niños y niñas y los juegos matemáticos en la escuela conforman el enfoque del libro, y permiten conocer, y sobre todo descubrir, a partir de las múltiples actividades posibles, los diversos conceptos matemáticos que los niños de estas edades pueden hacer suyos. La autora nos muestra a un niño capaz, lleno de recursos y de intereses por aprender, un aprender sobre el que siempre quedan interrogantes, sobre cómo aprende, y sobre de qué o de quién aprende. Y también nos muestra a un maestro capaz, capaz de escuchar al niño, de descubrir en ...