In my mental lesson control booth, I have three sliders I try to get right.
The first slider is ratio. I learnt this idea from Teach Like a Champion by @Doug_Lemov, who got it from Dave Levin from Kipp.
Ratio is the amount individual students spend actively thinking in class compared to the total lesson time. For example, in a teacher-to-one Q+A session, the ratio is low for every child who isn’t asked the question – most children don’t think much in those circumstances. You can increase the ratio by asking a question to the class and then getting them to answer it in pairs.
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