Los huesos de Descartes

Introduces different kinds of light, the properties of light, and how light can create shadows of different shapes and sizes.

¡Vamos criaturita, vamos! offers a simple introduction in Spanish to some of nature's most intriguing creatures, from the earthworm in the ground to the bee buzzing in a flower; from the spider in its web to the firefly lighting up the night sky.

So you think you're a martial arts master, but do you know the difference between kung fu, kendo, and karate? Students will learn about various martial arts as they practice comparing numbers. This nonfiction math book combines math and literacy skills, and uses real-life examples of problem solving to teach subject area content. The full-color images, intriguing sidebars, practice problems, and math diagrams make learning math relevant and fun. Text features include a table of contents, glossary, and index to increase understanding of math and reading concepts. An in-depth problem-solving...

Discute aspectos alimenticios, médicos, y sociales del embarazo y la maternidad adolescentes. -- Discusses nutritional, medical, and social aspects of teenage pregnancy and teenage parenthood.