The Minneapolis school board has ended its contract with a private, for-profit management company. Public Strategies Group, and its president Peter Hutchinson, took over administration of a troubled school district three and a half years ago. Board members say the company has completed its mission. But the change comes at a time when the district is being criticized by state officials and minority groups for not measuring up. Minnesota Public Radio's Tim Pugmire reports... The Minneapolis school board decided in 1993 to look outside traditiona