|NASCOLA offers a unique quality assurance program for the interpretation of platelet aggregation testing with individualized reporting. Surveys are offered twice annually, with on-line data entry. Subscribers to this EQA module can view and edit their submissions when exercises are open. After scoring is complete, they can view and retrieve their customized report and the summary report for all participants. NASCOLA has seen a significant improvement in laboratory performance over time on these exercises, which suggests the postanalytical challenges are a helpful addition to laboratory EQA. These practical challenges are developed in collaboration with the NASCOLA Platelet Working Group.