Cómo funcionan los ecosistemas

During the California gold rush, the state's population soared, its economy grew, new towns popped up, and its cities swelled. The state would not be what it is today without the gold rush. Help students achieve literacy in social studies through dynamic primary source documents! Primary sources provide authentic nonfiction reading materials, and help students understand continuity and change over time. This Interactiv-eBook offers instructional opportunities to guide students to increased fluency and comprehension of nonfiction text. Aligned to the National Council for Social Studies (NCSS)...

This truly is a strange book. For starters, it talks to the reader. What's more, there are no colors until someone gives it color. Who is going to do this? The reader of course. What better way to do this besides with your fingers and hands? Full of tracing and marks, this story is far from a coloring book.

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...

¡Descubre a los monstruos más bestias e increíbles de toda la historia! ¡Con todo el humor y las ilustraciones desternillantes de Pascu y Rodri, de Destripando la historia! El mundo está plagado de monstruos y es nuestra misión hablarte de los más raros, los más alucinantes y también los que han acompañado a héroes y dioses de todas las mitologías del planeta. Desde el famosísimo Chupacabras hasta el colosal Yeti, pasando por el Minotauro, la Esfinge, los kappas y muchos más... Los bicharracos más locos y fascinantes de todos los tiempos... ¡te están esperando en este libro!...