@BillGates The trouble with Japanese-style lesson study is that it takes time. Teacher-participants spend months or more on a single lesson.
@BillGates So lesson study only makes sense if its output can be used nationwide. Which, in Japan, actually does happen.
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@BillGates And lesson study requires expertise, both from teacher-participants and from outside subject matter specialists. -
@BillGates The Japanese profit from lesson study because they've invested in it comprehensively, over the long term. There's no magic in it. - 6 more replies
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