La vida amorosa de los animales

Learn how technology has improved lighthouses over time with this book that features a hands-on STEAM challenge and uses real-world examples to give insight into how the engineering design process is used to solve problems.

Learn about some animals that are in danger of becoming extinct and what people are doing to Save the Animals.

"Some things are so huge or so old that it's hard to wrap your mind around them. But what if we took these big, hard-to-imagine objects and events and compared them to things we can see, feel and touch? Instantly, we'd see our world in a whole new way." So begins this endlessly intriguing guide to better understanding all those really big ideas and numbers children come across on a regular basis. Author David J. Smith has found clever devices to scale down everything from time lines (the history of Earth compressed into one year), to quantities (all the wealth in the world divided into one...

Teach students about World War I and how it began with this nonfiction Spanish-translated book. Readers will learn about important topics such as neutrality, alliances, propaganda, liberty bonds, and communism. Intriguing facts, primary source images, and supportive text work to engage readers and help students understand the social studies content. Informational text features help students navigate the text.