Tim Knowles, of the University of Chicago's Urban Education Institute, worries about too little, leaving mediocre schools with not enough incentive to improve.

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The charter-school concept has also attracted new institutions into early education, says Tim Knowles, director of the Urban Education Institute, which is part of the University of Chicago.

ECONOMIST: Education

Local councillor Tim Knowles said residents had been looking forward to the switchover, but added that "a lot of the older generation are rather concerned about what the next few weeks might bring".

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