Open up a world of discovery with these engaging texts featuring 15 different life science topics covering biomes to taxonomy. This book helps all students grasp important science concepts through high-interest science material written at four different reading levels. Each text is presented in two-page formats and complemented with comprehension questions written at each reading level. Teacher Resource CD features a modifiable version of each passage plus full-color versions of the text and image files. Resource is designed for children in fourth-grade through 12th-grade.