¿Por qué hibernan los animales? (Why Animals Hibernate)

Diamonds and salt are both minerals, but diamonds are more rare than salt. Curious readers will learn what physical and chemical conditions must be present for minerals to form. They'll discover how minerals are identified and how they are used in daily life. Informative and interesting text presents readers with this science content in a fun way. A graphic organizer shows how different minerals are identified and fact boxes provide readers with exciting supplementary information.

¡Ahora disponible en edición español! La congresista Bárbara Jordan tenía una voz grande, potente, y segura – ¡y sabía como usarlo! Aprenda sobre su carrera asombrosa en este libro de cuentos ilustrado que inspira con la biografía de la abogada, profesora, legisladora, y líder de derechos civiles. Aún como niña criándose en el Quinto Distrito de Houston en Texas, Bárbara Jordan se destacó por su voz potente, valiente, radiante, clara, fresca, y segura. Era una voz que causaba que la gente se sentara atenta, se enderezara y tomara nota. ¿Qué haces con una voz así? Bárbara...

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.

Spanish edition of the popular Team Spirit series featuring the history, accomplishments, and key personalities of the Los Angeles Lakers basketball team. Includes timelines, quotes, maps, glossary and websites.

The use of calendars dates back thousands of years. Why are we driven to record time, and what would happen if we did not? Who created the concept of calendars? Why do different cultures use different calendar systems? And why are calendars so important to us? It is about "time" we found out! Created in collaboration with the Smithsonian Institution, this Spanish-translated Smithsonian Informational Text builds reading skills while engaging students' curiosity about STEAM topics through real-world examples. Packed with factoids and informative sidebars, it features a hands-on STEAM challenge...