"Threshold concepts aren’t new. Originally proposed by Jan Meyer and Ray Land, they have been adopted by faculty in many disciplines. Essentially, they challenge us to identify places where students typically get stuck as they wrestle with a way of knowing that they find unsettling and troublesome. These concepts, when grasped, so profoundly change the way students think that they are transformative and irreversible. Meyers and Land also believe them to be integrative, yet uniquely tied to a particular discipline."
Via Society for College and University Planning (SCUP)