Los ciclos de vida de los peces (Fish Life Cycles)

Many insects hatch from eggs and molt several times as they grow bigger. Others, such as butterflies, undergo a complete metamorphosis. A common science curriculum topic, insect life cycles may be confusing because of these differences. However, this book breaks down these cycles into easy-to-understand steps in both accessible language and colorful diagrams readers can turn to for review again and again. The most important vocabulary needed to talk about insect life cycles is further explained in fact boxes and an extended glossary.

Advances in science have changed our world, all thanks to the scientists behind important discoveries. Some of the most important discoveries have come from female scientists, who were as unique for their work as they were for being trailblazers in a male-dominated industry. This text offers a biographical treatment of such important scientists as Marie Curie, Rachel Carson, and Jane Goodall, as well as others who have made it possible for women of the future to have a career in science. Age-appropriate text, fact boxes, historical and modern images, and a comprehensive timeline complete the...

La 'Gramática de la Lengua Española' es el resultado de más de diez años de trabajo del catedrático y académico Emilio Alarcos Llorach. Ha sido redactada buscando el equilibrio entre la claridad y el rigor de la exposición, y concebida con una intención normativa y didáctica, por lo que constituye algo más que un mero tratado teórico de la materia. En ella se exponen los rasgos de la gramática del español en los actos orales y escritos de los usuarios de la lengua en este siglo XX, descritos según un hilo conductor consecuente y con una orientación metodológica funcionalista.

Introduce students to capital resources and how they work as part of our economy. This Spanish-translated text will teach young readers about the economy, while building their literacy skills and social studies content knowledge. Simple informational text features help students navigate the text, while primary source documents and images keep students engaged.

"Conoce a los artrópodos, desde las mariposas y los escarabajos hasta las arañas y las libélulas. Descubre animales extraordinarios que son soldados o reinas y otros que matan de una sola mordida. Aprende qué podemos hacer para ayudar a estas criaturas y cómo ellas pueden ayudar a nuestro planeta."--Page 4 of cover.