The gap between California charter and district schools in reading achievement has widened since the first report 14 years ago by the Center for Research on Education Outcomes at Stanford University. There has been steady progress in math as well.

"Data breaches have become all too common for public agencies and private businesses alike, and we recognize the impact they can have on individuals," said Matt Smith, interim superintendent of DMPS.

Several superintendents are switching districts and a number of first-timers are also stepping up as summer break gets underway.

Superintendent Kurt Browning, the longtime leader of Florida's Pasco County Schools, calls himself a "champion of choice," having launched several magnet programs and expanded advanced curriculum offerings.