Develop interest and confidence in advanced science by building science vocabulary and math skills while exploring physical science concepts! In Strengthening Physical Science Skills, topics include matter, gravity, density, motion, simple machines, electricity, light, and more. It also includes a CD-ROM with interactive exercises that are automatically scored and printed, plus printable worksheets and reading activities. It also supports NSE standards. Mark Twain Media Publishing Company specializes in providing captivating, supplemental books and decorative resources to complement middle- and upper-grade classrooms.