Animales asombrosos: Ballenas salvajes: Suma y resta: Read-along ebook

Young readers may have heard about the benefits of using and making the most of their resources, but how does that factor into an economic discussion? This thorough discussion defines resources and describes the different types of resources and why some divide them into three categories and others choose four. The book also addresses the concept of scarcity, showing readers how, because all resources have their limits, it is important to use them responsibly and efficiently in a healthy economy.

La autora ha recogido las aventuras que Alberti le contó sobre su loro Cocorito, e incluye 22 láminas expresamente dibujadas para esta edición por el propio Alberti.

Describes the ancient giant kangaroo of Australia's distant past that was five times the size of today's largest kangaroos. Discusses how the animal lived and how it became extinct.

Immigrants help make the United States a special place. Learn all about the history of immigration to the United States as you sharpen your data measurement 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, sidebars, and math diagrams extend the learning experience and provide multiple...