A lesson is usually a sequence of distinct episodes. Within an episode the teacher may make a large number of specific moves (making a statement, asking a question, handing out a worksheet, drawing a diagram…). The lesson plan will set out the intended sequence of lesson episodes, but some teaching moves will be decided upon spontaneously in situ in response to the reactions of the learners.
Former school and college science teacher, teacher educator, research supervisor, and research methods lecturer. Emeritus Professor of Science Education at the University of Cambridge.
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