Kumon Answer Book Level B Math GuideUse the standard Kumon symbols—a large circle for a perfect page, and a small "x" for an error. Some centers provide access to digital portals or PDF versions for parents who prefer to grade on a tablet. kumon answer book level b math For older students, having the answer book allows them to self-correct, fostering a sense of accountability. How to Use the Answer Key Correctly Use the standard Kumon symbols—a large circle for |