Book excerpt: The Earth is constantly changing. Earthquakes shake the ground. Volcanoes create new land. Water and wind erode rocks. These natural things are changing the face of our planet. Colorful images, supporting text, a glossary, table of contents, and index all work together to help readers better understand the content and be fully engaged from cover to cover. This 6-Pack includes six copies of this Level R title and a lesson plan that specifically supports Guided Reading instruction.