The Reflecting on threshold concepts: an introductory tool is for anyone wishing to understand and apply a cluster of ideas around threshold concepts and the learning that occurs when students encounter troublesome ideas that transform their understanding of a particular discipline or part of it. This transformation can be in terms of new knowledge new methods a new identity or new practices and it is most often characterised as a portal or threshold through which the learner must pass. The tool is designed for those new to teaching and experienced teachers and lecturers who would like quick access to threshold concepts and the related pedagogy. It provides an overview and definitions examples and applications critical responses and resources.
