NEWARK - New Jersey is expected to add 23 new charter schools to its education system.

Gov. Chris Christie (R-NJ) announced the plan today at the Robert Treat Academy in Newark, the state's highest-performing charter school.

Christie said the approval of the charter schools is a vital part of his education reform agenda.

New Jersey currently has about 73 charter schools, mostly in urban areas. A Star-Ledger survey of educational data shows more than half of them outperform local school districts on standardized tests.