7Encourage students to create their own learning portfolios with Interactive Notebook: Life Science for grades five through eight. This Mark Twain interactive notebook includes 29 lessons in these three units of study: -structure of life -classification of living organisms -ecological communities This personalized resource helps students review and study for tests. 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, this product line covers a range of subjects including mathematics, sciences, language arts, social studies, history, government, fine arts, and character.