“…These enhancements included inter alia, embedding TPA in a theory of education (Edwards-Groves et al, 2018); the conception of leading as a transformational practice in education (Edwards-Groves & Grootenboer, 2021;Edwards-Groves et al, 2020;Gibbs, 2020;Wilkinson, 2021); the idea of travelling practices (Wilkinson et al, 2013); and the description of the 'leverage professional' (Jenkin, 2020). Practice theory in combination with social theories of time (Blue, 2019;Blue et al, 2020;Karger, 2021;Southerton, 2003) was also useful as the practices described took place over five years and built upon 20 years of creation of courseware practices which preceded them.…”