Explore social studies materials in today's classrooms with content that will capture the interest of all readers with these award-winning books that include engaging, leveled texts. The set features 4 titles including Early America, Expanding & Preserving the Union, World Cultures Through Time, and The 20th Century. Designed to help all students grasp important historical people and events, the high-interest social studies texts in these books are written at four different reading levels ranging from 1.5 to 7.2. Each text is presented in a two-page format and complemented with comprehension questions written at each reading level. Each book includes a Teacher Resource CD with a modifiable version of each passage plus full-color versions of the text and image files. 144 pages per book.