Financial mismanagement and low performance have likely doomed a handful of charter schools. The city announced Monday it would move to close Peninsula Preparatory Academy in Far Rockaway, Queens and Williamsburg Charter High School in Brooklyn. Peninsula students would be assigned to local elementary schools. Williamsburg students could be left scrambling for placements for September. Williamsburg's charter network, Believe High Schools, has been under investigation by the state Attorney General's office. Now the state says it will try and revoke the charters for the two other schools in the Believe network.