The International Standards Committee recently published an open access ISNCSCI Classification Workbook that includes 26 practice cases with detailed explanations of the correct classifications. These cases reinforce important ISNCSCI rules and definitions. Potentially challenging concepts from the 2019 ISNCSCI update, including revised definitions of the ZPPs and documentation of non-SCI conditions, are also reviewed. The workbook can serve as a valuable training tool to improve classification accuracy.