The Mindfulness-Based Interventions: Teaching Assessment Criteria (MBI:TAC) offers a map of the territory of mindfulness-based program (MBP) teaching skill, a way of assessing these, and a way of reflecting on skill development. The talk will offer an overview of the particular characteristics of teaching skill in the MBP context, how the MBI:TAC tool organises these into a framework, and how the tool can be used in research and practice contexts.