Lesson Lost on Teacher? 3rd Sex Rap

April 29, 2008— -- Stephanie Ragusa flashes the same smile in all three mugshots, but there's nothing charming about the middle-school teacher's third arrest in six weeks for alleged sexual encounters with Florida teens.

Ragusa, 29, was arrested Monday in Hillsborough County when investigators saw her leaving a 16-year-old high school student's house just before 1 p.m. Authorities say Ragusa had continued having sex with the teen victim since her initial March 13 arrest for one relationship and her April 15 arrest for another.

Ragusa was in court today to face two felony counts of unlawful sexual activity with a minor. A judge ruled that she will be held without bond as the court begins to wade through more than 10 charges related to alleged sexual activity with minors.

Ragusa had no comment for local reporters as she was lead into the courtroom. Attempts by ABC News to reach her attorney, Robert Herce, were unsuccessful.

The teenager connected to Monday's arrest was one of the two boys she had already been accused of having sex with, according to Debbie Carter, a spokeswoman for the Hillsborough County Sheriff's Office. Unclear was which of the two teens was involved in Monday's incident.

Ragusa was originally arrested in mid-March and charged with five counts of lewd and lascivious battery for what sheriff's deputies described to ABC News at the time as a consensual relationship with a 14-year-old student.

That affair, according to the sheriff's office, lasted from January through May 2007, and included intercourse and oral sex. Some of the alleged encounters took place in her apartment, others in her Lexus.

The boy in that case identified Ragusa as having a distinctive pair of tattoos on "either side of the groin area." A school resource officer first asked the boy about the rumors and then detectives investigated. They had the boy call Ragusa under police direction and she "admitted to the interaction," the sheriff's office said at the time.

After the first arrest, a judge set Ragusa's bond at $12,500, which she posted after she spent a weekend in jail. She made no public comment upon her release.