Canto a Sonora: vida y obra del compositor José Sosa Chávez

What causes sound? How does sound travel? Sound begins when matter vibrates. Without this vibration sound could not move and nothing would make any noise. Starting with tiny molecules, this book explains the main concepts of sound and furthers understanding through a series of easy-to-do experiments that will appeal to readers of all ages.

Students will develop their geometry skills as they study the geometric shapes of modern art and read about the innovative artists who turned the art world upside down. This Spanish book seamlessly integrates the teaching of math and reading, and uses real-world examples to teach geometry concepts. Text features include a glossary, an index, captions, and a table of contents to increase students' vocabulary and reading comprehension skills as they interact with the text. The rigorous practice problems, math charts and diagrams, and sidebars provide many opportunities for students to practice...

Esta obra reúne textos escritos por Andrés Lira sobre el exilio español y los maestros de ese exilio, como: José Medina Echavarría, José Miranda, Ramón Iglesia, Juan Antonio Ortega y Medina, Eugenio Ímaz y José Gaos, quienes han formado parte tanto de la Universidad Nacional Autónoma de México como de El Colegio de México.

Beginning readers will be captivated by the creatures they meet in this Spanish translation of Prehistoric Creatures. The simple text describes ancient animals that swam the seas, soared through the skies, and roamed the Earth long before people existed. Each book describes a group of dinosaurs that shared one or two fascinating features. Dazzling illustrations help bring these amazing creatures to life!