¿Comen hierba los tigres?

Plants are the living things that have been on the planet longer. How do they manage to protect themselves if they can't move? Explore the different mechanisms that plants use to survive in different habitats.

Una cosa es ir a un museo a ver los cuadros, y otra muy distinta caerte en ellos. Eso es lo que pasa cuando el tío Utopía lleva a Guille y sus compañeros al Museo Thyssen con un invento suyo: las CuadroGafas 5D. De pronto se encuentran dentro del mundo fantástico que los pintores imaginaron.

Take a trip to the British Museum as you explore its fascinating objects and geometric shapes! This famous London museum was built for exploration - and for learning geometry. Learn about its history and artifacts as you build your geometry skills. This Spanish math book seamlessly integrates the teaching of math and reading, and uses real-world examples to teach math concepts. Text features include images, a glossary, an index, captions, and a table of contents to build students' vocabulary and reading comprehension skills as they interact with the text. The rigorous practice problems,...

En el libro se describe una tormenta el?ctrica, se explica qu? son los rayos y los truenos y se indica qu? hacer para protegerse durante una tormenta.

The Industrial Revolution brought important changes to America. People began migrating to cities for work, and immigrants began to arrive in American in larger numbers than ever before as they looked for new employment opportunities. Readers explore the impact of the Industrial Revolution on U.S. migration and immigration patterns. As readers learn about essential social studies curriculum topics, engaging historical images and detailed primary sources hold their interest. This transformative period in American history comes alive for readers with each turn of the page.