The Tampa middle-school teacher arrested a third time this week on charges that she had sex with her students was ordered to remain behind bars through at least Friday after she was denied bond.

A judge postponed a preliminary hearing Tuesday for 29-year-old Stephanie Ragusa after ordering her held without bond, a Hillsborough County Circuit Court clerk told FOXNews.com.

Ragusa, who wore an orange prison jumpsuit to court and smiled when she emerged, was sent back to the Orient Road Jail until Friday — when she'll again appear before a judge at about 8:30 a.m. EDT.

Police contend that she has repeatedly had sex with two different Davidsen Middle School students since January 2007.

They said they picked her up Monday after they discovered her in bed again with one of the boys, who is now 16, while she was out on bail. It was her third arrest in about six weeks.

Ragusa has been charged with several counts of lewd and lascivious battery and sex with a minor.

She is still suspended without pay from her last job teaching math at Martinez Middle School, according to the Hillsborough County District.

Ragusa was first arrested March 13 and then again April 15 for allegedly sleeping with one of the boys at least 20 times and with the other at least three.

She was charged with driving under the influence in 2005, according to police records.

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FOX News' Catherine Donaldson-Evans contributed to this report.