The King County Sheriff's Office is investigating allegations that a 37-year-old Kentlake High School female teacher had sex with a 17-year-old male student.
Sgt. John Urquhart says the student's mother went to school authorities with her suspicions after she found an unusual number of text messages between her son and the teacher on the boy's cell phone.
The Sheriff's Office began investigating March 8 after being notified by the school officials.
The teacher was booked into King County Jail last Thursday on investigation of sexual misconduct with a minor. She was released the next day, and is due in court Tuesday.
School officials have placed the teacher on administrative leave. She has not been charged with a crime.