The U.S. History Time Line Topper bulletin board set provides a visual timeline of important events in US history. Unique artwork illustrates the events, with the pieces die-cut to follow the artwork. Mark Twain Media Publishing Company specializes in providing engaging supplemental books and decorative resources to complement middle and upper-grade classrooms. Designed by leading educators, the product line covers a range of subjects including mathematics, sciences, language arts, social studies, history, government, fine arts, and character.