Book excerpt: Give your students a jump start on science mastery. In this helpful classroom resource, short, daily warm-ups cover life cycles, the diversity of life, and energy flow in living communities. It includes five warm-ups per reproducible page, answer keys, and suggestions for use. --Mark Twain Media Publishing Company specializes in providing captivating, 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. Mark Twain Media also provides innovative classroom solutions for bulletin boards and interactive whiteboards. Since 1977, Mark Twain Media has remained a reliable source for a wide variety of engaging classroom resources. -