SANTA ANA, Calif. (AP) – Two teachers have been charged with having sex with students and providing alcohol and cocaine to them during an overnight beach camping trip in Southern California.

Thirty-eight-year-old Melody Lippert and 30-year-old Michelle Ghirelli are each charged with unlawful sexual intercourse and giving a controlled substance to a minor — both felony counts. The Orange County district attorney’s office said Monday that Ghirelli is also charged with oral copulation of a minor.

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Authorities say Lippert and Ghirelli allegedly gave alcohol and cocaine to students from West Covina’s South Hills High School at San Clemente State Beach last year.

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Ghirelli’s attorney tells the Los Angeles Times she will plead not guilty. It’s not immediately known if Lippert has a lawyer.

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The women resigned from the Covina-Valley Unified School District last week