Independent education consultant Terry Mackie argues that the key theme from today's report from the OECD, and what should now become a focus for the Welsh Government, is the need to improve how schools support low-achieving pupils.
"It is beyond dispute that Wales has not met the diverse learning needs of all students," he said.
Mr Mackie describes the problem as "fixable", and says there needs to be "differentiating" teaching for individual pupils, intervening where they need extra support.
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