What’s wrong with low-cost education in poor countries? Quite a lot, you might think, if you read a new report from the Department for International Development. Low-cost private schools serve around 70 per cent of children in poor urban areas and nearly a third of rural children too. But the issue raises controversy among academics and experts, not least because it goes against 65 years of development dogma that the only way to help the poor is through government education, with big dollops of aid thrown in.