A judge in Beaumont sentenced 51-year-old Timothy Russell Verdon, who formerly taught at Hamshire-Fannett Middle School in Beaumont.
Investigators say the girl was 15 when she met Verdon in 2008.
Verdon in March pleaded guilty to sexual assault of a child and to an improper relationship between an educator and student.
He was sentenced Monday to 15 years on each count, with the prison terms to be served concurrently.
