The UK needs to "nail down rigorous academic standards" in its education system, according to a leading columnist.
Angela Epstein dismissed calls for more to be done to protect children's wellbeing as schools took a tougher academic focus.
She said: "We have poor standards of numeracy and literacy in this country. Children learn by being amongst their peers and by children being children."
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The pair, believed to be the boy's mother and stepfather, were held after the five-year-old's lifeless body was discovered in a lagoon.