La luz y sus efectos (Light and Its Effects)

Learn all about the law of conservation of mass 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 with this nonfiction book that explores the law of conservation of mass in detail. Aligned to state and national standards, this leveled text supports students reading at above-, below-, and on-grade level. The fun lab activity encourages students to think like scientists. Keep students engaged in learning with this Spanish book.

People today refer to the Midwestern and prairie states as flyover country. During the Civil War, crossing those areas was the biggest obstacle in uniting the East and West Coasts of our divided nation. An act of Congress in 1862 authorized the Central Pacific and the Union Pacific railroad companies to build a railroad that would link the coasts. Seven years later, on May 10, 1869, an overwhelmingly immigrant labor force completed the task when a rail line was join in Promontory, Utah. The states had become united at last.

Animals sing or talk to communicate. They make noise for different reasons. Find out why some animals make certain noises. Paired to the fiction title So Many Classes.

José María de Mena, cordobés de nacimiento, es Doctor en Filosofía y Letras, especializado en Historia, Licenciado en Ciencias de la Información y Diplomado en Teología. Desde 1946 ha desarrollado su intensa labor docente (en Sevilla y Bogotá), su labor periodística de divulgación de temas históricos (en ABC, Diario Madrid, Diario Da Manha de Lisboa y El Siglo de Bogotá) y su inmensa tarea editorial de divulgación de temas históricos de las ciudades de Sevilla, Córdoba, Barcelona, Madrid y de la historia de España a través de de treinta y ocho libros sobre asuntos de interés...

"While preparing for Christmas in Puerto Rico, seven-year-old Esmeralda asks the Three Magi for a baby doll like her cousin's, but when they bring something else instead she gains a deeper understanding of the meaning of the holiday."