¡cucú!

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.

A young boy travels to China to learn about the people and culture of one of the world's most powerful nations.

A Rube Goldberg machine is designed to perform a simple task through a series of elaborate steps. These simple machines are named after Reuben “Rube” Goldberg, an American cartoonist, engineer, and inventor. Learn how these fun machines work and ignite a curiosity about STEAM topics! Created in collaboration with the Smithsonian Institution, this informational text features a hands-on STEAM challenge that is perfect for makerspaces. Make STEAM career connections with career advice from Smithsonian employees working in STEAM fields. Perfect for school reports and projects, this Spanish book...

La llegada del señor Bunch, tras un largo viaje, no resulta muy alentadora para su hijo Harry, quien se verá obligado a hacer ejercicio y variar la dieta. Pero el talante simpático del chico y su buen corazón le llevarán a protagonizar una misión arriesgada para salvar a su vecina, la anciana señora Lathom. Con la ayuda de una colega, aclarará todo el «jaleo» producido en torno al tejado de la casa de la víctima.