Book excerpt: An experienced math teacher shares the 250 10-minute quizzes he developed that helped boost his students' mental math skills and their scores on standardized tests. Topics covered include addition, subtration, multiplication, division, numeration, patterns, percents, ratio, rounding, prime numbers, geometry and much more. Includes ready-to-use, reproducible answer sheets. Geared to the NCTM standards. For use with Grades 4-8.