(Hillsboro, OR)  --  A former teacher at Sherwood High School will spend 30 days in jail for having sex with a 16-year-old student.  Denise Keesee has also been placed on probation for five years and must register as a sex offender.  Keesee was arrested in June after being accused of having sexual contact with three students, but the conviction involves only one student.  Keesee will also be required to surrender her teaching license and complete sex-offender treatment.