Stephen Stahl is charged with corrupting a minor.
He is accused of having sex with a 16 year old Coughlin student in 2004.
The alleged victim, who is now 26 testified today that she and Stahl had a sexual relationship for more than a year.
She says it happened inside his classrooms at Coughlin High school, local hotels, and even at Stahl's home.
Stahl denies the allegations.
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