Foreword -- Preface: Threshold Concepts in Practice -- Acknowledgments -- Part 1: Theoretical Directions -- On the Threshold with Students -- Toil and Trouble: Threshold Concepts as a Pedagogy of Uncertainty -- Integrated Threshold Concept Knowledge -- The Career of Threshold Concepts in a Large-Lecture History Course: An Examination of Uptake of Disciplinary Actions -- A Threshold Concept Fram…