Juega con los numeros / Mix and Match Magnetic Numbers

Esta guía visual ayuda a comprender los comienzos del universo y del sistema solar, el inicio de las diversas formas de vida en nuestro planeta, el origen africano de los seres humanos y su desplazamiento por los continentes. Un libro que nos descubre nuestra historia en la Tierra y nos explica por qué todos somos parientes.

From art and architecture to politics, philosophy, and mathematics, "western civilization" owes a great deal to the achievements of ancient Greece, but what do we really know about this long-gone civilization? How did geography influence the politics of the Greek city-states? What's the difference between an agora and an acropolis? This book takes readers several thousand years into the past, when independent city-states ruled the Mediterranean Sea, to find the answers. Full-color photographs and maps, accompanied by accessible text, introduce readers to the many contributions the ancient...

A fierce ogre finds that children are becoming too smart for him to catch and eat. Instead, he passes his time writing arithmetic problems to challenge the children.

What has a head, two tails, and shoots across the sky? A comet. Coming from the far edges of the solar system, most comets travel around the Sun, while meteors appear as flashing streaks of light in the night sky. Explore these amazing celestial wonders as they zip through space! This book looks at the difference between comets and meteors and their effects on Earth. The physical characteristics of each are identified in detail. This book won’t come crashing down! It’s filled with fun facts that give additional information on this exciting science topic. This book allows students to use...