El «Regimiento de la declinaçion del sol» del virrey D. Antonio de Mendoza

¿Qué significa migrar? Descubra qué animales migran y por qué migran a través de fotografías detalladas y texto simple. What does it mean to migrate? Discover which animals migrate and why they migrate through detailed photographs and simple text.

There are many steps in the nitrogen cycle that include difficult concepts and words: denitrification, prokaryotes, ammonia, and more. With the help of this understandable book, even struggling readers will grasp this cycle of nature. Low-level language, fact boxes, and an extended glossary provide readers with essential vocabulary explanations that allow them to further understand each step of the cycle. Full-color diagrams aid readers' comprehension as they move through the cycle from start to finish, and then around again.

Simple illustrations and text introduce young readers to various types of seeds; and includes instructions for a related activity. Presented in Spanish.

Animals hide to avoid being eaten or to sneak up on animals they want to eat. This amazing book introduces children to some basic science concepts. Fascinating photographs feature animals that can change color, or that have different shapes and patterns, so that they can blend into their surroundings. A special section also features animals that do not need to hide.