Does your child need assistance with mastering multiplication? Mrs. L. Taylor highly recommends Learning Wrap-ups Multiplication Self Correcting Math Problem Keys. This product may be found on Amazon.com (don't forget to use smile.amazon.com) for a nominal price. How does it work? Students wrap the string from the problem on the left to the answer on the right, & then turn the wrap-ups over to see if they got the right answer. The Wrap-ups utilize many learning senses.