Polly Toynbee questions the methods used in the Sure Start evalution but repeats the claim made by the Head Start evaluators that, 'every $1 spent on under-fives saved $7 by the time the children were 30'. Unfortunately this has almost the status of an urban myth and the methods of that evaluation require close scrutiny tooEducationGuardian.co.uk | Schools special reports | Polly Toynbee: We must hold our nerve and support deprived children: