¡Que vivan los oficiales de policía! (Hooray for Police Officers!)

Exploración espacial is one book in the Spanish-language Gran Atlas de la Ciencia series that covers today's most popular science topics, from digital TV to microchips to touchscreens and beyond. Perennial subjects in earth science, life science, and physical science are all explored in detail. Amazing graphics--more than 1,000 per title--combined with concise summaries help students understand complex subjects. Correlated to the science curriculum in grades 5-9, each title also contains a glossary with full definitions for vocabulary.

Imagine traveling at half the speed of a jet plane without ever leaving the ground! Students will discover the technology that makes such speeds possible, from special tracks and safety precautions to aerodynamically designed trains. What are the limits to the speed of trains? What imposes those limits? Students also will read about the future of passenger train travel, from flying trains to trains that use huge magnets to levitate inches or centimeters off the track. Some trains safely reach speeds of more than 200 mph!

Equality is a contentious issue in our society today. This is why it's important for students to be given information related to equality so they can come to reasonable conclusions of their own. Using age-appropriate language, this book discusses equality in a number of different forms and touches upon why equality is so important in a democracy. The text also explores how extreme equality, like most extremes, could be a bad and unrealistic idea. Readers will gain enough information to understand and think about this complex idea for themselves.

«Los más de los poetas y poemas que aparecen en las páginas que siguen llegan a ellas con la impecable ejecutoria de hidalguía de una sostenida influencia en otros creadores y en otros textos, una opinión crítica unánime y la evidente predilección de los aficionados. A decir verdad, mi tarea ha sido fundamentalmente ir a buscar en las ediciones de mayor solvencia esos poemas y esos poetas estrictamente clásicos y traerlos aquí en la más amplia medida que permitieran las dimensiones del volumen. »En los horizontes de la poesía española, hay, con todo, zonas de penumbra: períodos ...