Have you ever seen worksheets with dozens of the same kinds of problems or perhaps riddles at the bottom? Robert Kaplinsky, Educator, Presenter, and Co-Author of HMH AGA and Into AGA, has used similar worksheets with his students for years. What he wonders now, with more perspective, is whether they were the best option for students. For example, if a student correctly solved the first four or five problems, what extra benefit did she get from solving 20 more similar problems? What extra information did he get about what she knew?