Agujeros negros (Black Holes)

Introduce students to primary sources and the importance of fairness with this engaging book! The primary source images and simple sentences will engage students in reading and build their social studies content knowledge. For use in the classroom or at home, this Spanish book includes a simple glossary and index to introduce informational text features to young readers and provide additional reading support.

This award-winning beginner's guide to the natural world of fish from the creators of the About... series was named an "NSTA Recommends" book. Noted educator and author Cathryn Sill uses simple, easy-to-understand language to teach children the basic characteristics of what fish are, how they swim, breathe, and reproduce, and explains the different ways they protect themselves from predators. With beautifully detailed, realistic paintings, noted wildlife illustrator John Sill introduces readers to the diversity of the fish population, from an Arctic char to a porcupine fish. An afterword...

Divi rtete junto a Juan y Mar a contestando las perspicaces preguntas del sombrero. En este ingenioso libro los acertijos muestran c mo los cient ficos buscan todas las posibles respuestas a un problema y comparan una respuesta con la informaci n que ya tienen, c mo eliminan lo que no encaja en una situaci n planteada y, as , llegan a la respuesta correcta. quieres hacer trucos con sombreros?

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.