La resolución de problemas

This extraordinary book shows in a simple way how the Sun's light and warmth affect Earth. Children will be amazed to learn that the Sun is actually a star, and that its position and distance from Earth cause day and night as well as changing weather and the seasons. Simple, brief explanations also describe Earth's rotation and tilt, Earth's two poles and the equator, a solar eclipse, how plants make food from sunlight, and how sunlight colors our world.

Ice cream is a solid. But when it melts, it becomes a liquid. Solids can change to liquids and back again by melting and freezing. Read this Spanish-translated book to learn what happens when heat and cold and solids meet.

A trip to Comic-Con becomes an adventure in learning division! Join Zach as he travels to San Diego to attend his very first comic book convention. Along the way, learn about the history of comic books and comic book conventions, and meet the dedicated fans who make Comic-Con one of the most widely attended comic book conventions in the world. This book combines math and literacy skills, and uses real-life examples of problem solving to teach subject area content. The full-color images, math charts and diagrams, sidebars, and practice problems make learning division relevant and fun. Text...

En Alepo, una de las muchas ciudades sirias destrozadas por el conflicto que ha azotado a ese país por años, un hombre se dedica a rescatar a las mascotas que han perdido a sus dueños. Mohammad Alla Aljaleel era conductor de ambulancia. En vez de huir de la ciudad como tantos otros decidió quedarse para ayudar a los heridos por la guerra civil, y pronto se dio cuenta de que también había muchos animales que necesitaban auxilio. Así, Mohammad y un equipo de hombres construyeron el Santuario Ernesto para los Gatos Sirios, que con ayuda de donaciones provenientes de todo el mundo da...