TROPHY CLUB -- A Northwest Independent School District teacher has been arrested for allegedly having an improper relationship with a student.

Police say they believe 27-year-old Katherine Harper, a 7th grade English teacher and coach at Tidwell Middle School, had an inappropriate relationship with student, who was 15 at the time, last summer.

Harper posted a bond of $15,000 this week after being booked into the Denton County Jail.

This story will be updated as new information comes in.