The Spectrum(R) Data Analysis and Probability Workbook for sixth through eighth grade features 128 pages of sequenced instruction, practice, and reinforcement to build solid, grade-appropriate problem-solving and analytical skills. This standards-based workbook is filled with easy instruction, rigorous practice, and tests that help children build skills essential for math success. The concepts covered include ratios, measures of central tendency, graph interpretation, operations, and more. An included answer key helps teachers and parents accurately monitor students’ progress and feel confident in their competency. The best-selling Spectrum series is a favorite of parents and teachers because it's carefully designed to be both effective and engaging––the perfect building blocks for a lifetime of learning.