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Are smaller class sizes really better for learning?

It is a commonly held belief that reducing class sizes has a positive impact on learning. But actually, according to the research, it's not quite as simple as that

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Politicians like them, parents like them, teachers like them: smaller class sizes are surely a no-brainer when it comes to improving learning, right?

It may seem blindingly obvious that reducing the number of pupils in a class will improve the quality of classroom teaching. But, overall, the evidence suggests that it actually has a relatively small impact on student progress, which is disappointing given the high costs of employing more teachers.

So why don’t pupils benefit from having more individual attention from their teacher?

It is only when class size is reduced to under 20 pupils that ...

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