These 18 standards-based activities with mystery-picture drawings really motivate students to practice key math skills. After students complete each skill sheet, they use their answers to follow step-by-step directions that guide them to draw a hidden picture. Since only correct answers will create the right picture, these activities are self-checking and make great independent work or homework. Topics include addition, subtraction, multiplication, division, fractions and decimals, geometry, measurement, and more. For use with Grades 3–5.