¿Caimán o cocodrilo? (Alligator or Crocodile?)

¿Sabías que la forma tubular del submarino lo ayuda a moverse más rápido por el agua? Los tanques de lastre lo ayudan a hundirse o flotar. Aprende más datos fascinantes en Los submarinos, uno de los libros de Máquinas militares poderosas.

It was known as the age of the dinosaurs, but other fascinating creatures roamed the Earth at the same time. Learn about lesser-known animals from the prehistoric era that are no less fascinating! Students will be engaged in reading about ancient animals like Gigantopithecus, Titanoboa, Megalodon, and more as they develop their skills at reading and writing numbers. This nonfiction math book combines math and literacy skills, and uses real-life examples of problem solving to teach subject area content. The full-color images, intriguing sidebars, practice problems, and math diagrams make...

Winning the American Revolution was just the first step. After defeating Great Britain, the American colonies were united in name only. How would this independent nation be governed? During the summer of 1787, representatives went to Philadelphia to solve the problem. The result, the U.S. Constitution, created a new government, establishing the foundations of a free nation and setting a new course for history.

How much life can one cubic foot hold? Read how photographer David Liittschwager and zoologist Chris Meyer studied life in one cubic foot, and how their findings can teach us about life on the entire planet. Created in collaboration with the Smithsonian Institution, this Spanish Informational Text builds reading skills while engaging students' curiosity about STEAM topics through real-world examples. Packed with factoids and informative sidebars, it features a hands-on STEAM challenge that is perfect for use in a makerspace and teaches students every step of the engineering design process....