I’ve taught sets, mixed ability, and streams.
What follows isn’t any rigorous analysis, or appeal to research. From what I’m aware of the research, the conclusions aren’t exactly conclusive: lower attainers benefit from mixed groupings, higher attainers suffer. Mark McCourt reiterates this point, and takes it further by pointing out that those conclusions aren’t necessarily subject or key stage specific, while Lucy Rycroft-Smith suggested there was broadly no impact either way (MrBartonMaths Interview, roughly 52 min in. Research Espresso.)
So, this has nothing to do with research,…
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