Tuitear con un objetivo (Tweeting with a Purpose)

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!

People have been sending mail for a long time. But how they do it has changed a lot! Read about the history of mail as you learn to collect data. This Spanish math book combines math and reading skills and uses real-life examples of problem solving to teach subject-area content. The dynamic images, detailed sidebars, practice problems, and math diagrams make learning data measurement easy and fun. Text features include a table of contents, a glossary, an index, and captions to build vocabulary and increase understanding of math and reading concepts. An in-depth problem-solving section...

Plants are living things that grow and change. Over time, plants have made remarkable adaptations to suit the habitats in which they live. Simple text and beautiful images highlight how plants have adapted to life in the Arctic, in aquatic environments, and in other habitats such as those in deserts and grasslands.

Cañas y barro (1902) es una de las novelas fundamentales de Vicente Blasco Ibáñez, incluida entre las 100 mejores novelas del siglo XX. Magistral en la organización de la trama, en las descripciones y el peso de la narración, la obra emociona y conmociona al lector. Con unos personajes veraces y de gran fuerza, ambientada en la Albufera valenciana a finales del siglo XIX, la novela no se limita al cuadro de costumbres sino que presenta un drama humano con gran actualidad. Tomando como centro de la narración el devenir de una familia que habita El Palmar, los Paloma, la historia presenta ...