Math Games by VersaTiles, Self Guided Puzzle Workbook and Self Checking Answer Case An active alternative to math workbooksa great way to reinforce school learning at home. Answers can be easily and quickly self-checked with our unique answer case. Includes a VersaTiles answer case and a 64-page grade level standards-based, math practice book. Works with all VersaTiles products, and additional books can be purchased to continue practice. Packaged in a convenient storage bag.