A teacher in National City who won a Teacher of the Year award in August was arrested and booked into county jail for an “inappropriate relationship” with a 13-year-old former student, police said.

Jacqueline Ma, 34, was a teacher at Lincoln Acres Elementary in National City — just south of San Diego — where she taught fifth and sixth grades.

On Monday, a “concerned parent” reached out to the National City Police Department saying she was afraid her 13-year-old was being treated inappropriately by Ma, according to a news release.