A topic in Learners' conceptions and thinking
The term 'learning progression' may refer to either the observed pattern of development in a learner's thinking (also referred to as a 'learning trajectory') or a scheme to guide teaching with planned staging points in student thinking informed by research into learners' ideas (Taber, 2021).
Taber, K. S. (2021). Squaring the circle: Circumnavigating an ontological tension between practical learning progression models and the complex, multi-facetted, and meandering nature of conceptual learning. In M. N. Bowman (Ed.), Topics in Science Education (pp. 1-100). New York: Nova Science Publishers Inc.