The interface between teacher act and the improvement of students' learning

Drawing on the empirical data of the Learning Study projects conducted in primary and secondary schools in Hong Kong since 2000, this paper discusses the relationship between teacher act and the improvement of students' learning. This paper argues that students' perception of the object of learning depends on how they experience the pattern of variation created by the teacher during the teaching act. "What varies" and "what remains invariant" both matter. Thus teaching should be a conscious structuring act, where teachers actively construct the learning experiences for the students so that they can experience appropriate variations in the object of learning, in order to bring about the intended discernment and learning.