LOS ANGELES—The Los Angeles Unified school board has approved the drastic overhaul of one of the state's lowest performing high schools, a plan that will require teachers to reapply for their jobs.

Tuesday's unanimous vote gives Superintendent John Deasy the green light to transform Crenshaw High School in South Los Angeles starting in the next academic year.

The curriculum will be replaced with three magnet schools, which Deasy says is the district's most successful model. If teachers are not rehired, they can transfer.

Deasy says the intervention is needed because Crenshaw is the district's lowest achieving school. Just 3 percent of students are proficient in math and 17 percent in reading.

Teachers and parents protested at the meeting, saying the reform model already in place is starting to yield results.