Desde que somos tijera y papel

Inka rulers led a huge empire with grand palaces. They had incredible riches. Artists made statues out of gold and silver. The Inka also made masterpieces out of grass. Their grass bridges crossed deep canyons. These engineering marvels let soldiers and messengers travel around the empire. Created in collaboration with the Smithsonian Institution, this Smithsonian Informational Text builds students' reading skills while engaging their curiosity about STEAM topics through real-world examples. It features a hands-on STEAM challenge that guides students through every step of the engineering...

Espía, explora, esconde, ¡shht!, muévete como un ninja, experimenta, viaja, conoce, planea, conquista. Un manual con 50 misiones. 50 retos para verdaderos agentes secretos. ¿Crees que podrás sobrevivir en el mundo de los adultos?

Examines the nature of inclined planes and wedges, how they can reduce the amount of force necessary to perform work, and ways in which they are used.

Computer science is all around us, at school, at home, and in the community. This book gives readers the essential tools they need to understand the computer science concept of testing. Brilliant color photographs and accessible text will engage readers and allow them to connect deeply with the concept. The computer science topic is paired with an age-appropriate curricular topic to deepen readers’ learning experience and show how testing works in the real world. In this book, a class makes a budget so they can afford a field trip at the end of the month. This nonfiction title is paired...