Third Time No Charm for School District

Jan. 9, 2008 — -- For the third time this year, a Texas school district is assuring parents that their children are safe after a teacher was arrested and charged with sexually assaulting a student.

In the latest incident, Shannon Hrozek, 42, of Houston, was charged with sexual abuse of a child after police say a co-worker caught her performing oral sex on a 16-year-old boy inside a dark, locked classroom at Westfield High School. Hrozek will be in court today.

Hrozek's arrest comes less than a month after Carlos Hector Valencia, another Westfield teacher, was accused by an 18-year-old girl of inappropriate touching inside a campus barn where the school houses livestock. The alleged incident took place in November. Valencia, a Spanish teacher, will be arraigned later this month.

In October, 33-year-old Alison Mosbeck, a teacher at Dueitt Middle School, was arrested and charged with three counts of sexual abuse of a child and having an improper teacher relationship with a student. Mosbeck allegedly began a relationship with a boy after initially asking him where she could buy some marijuana, according to a court affidavit. She brought him to a festival, where a sexual relationship began.

Both schools are part of the Spring Independent School District, which serves about 32,000 students in Harris County, a suburb of Houston. The school district, described as among the fastest growing in Texas, has about 5,000 employees, the majority of them teachers.

But the size of the district hardly justifies the spate of incidents, school officials said, even if they are isolated.

"It happening one time isn't acceptable," Regina Curry, a spokeswoman for the school district, told ABC News. "Certainly happening three times is not acceptable."

None of the three teachers have been convicted of the charges they face and each is out of the school system pending the outcome of their respective cases.