Joseph Massey, a former charter school teacher, has been convicted of luring a minor for sexual exploitation and assault, and three counts of assault for the purpose of gratification.
In just one month of working at the school, Massey targeted three female students, ages 15, 15, and 18.
A report from the Pima County Attorney's Office says Massey would go to the students' desks, and inappropriately touch them on the thigh and buttocks while pretending to help them with their classwork. Another student confirmed seeing the inappropriate touching of one of the victims in the classroom.
Massey also offered to exchange sexual favors with one of the 15-year-old victims, according to PCAO.
Massey was arrested in January 2016 and his sentencing is set for January 16, 2018.
He had also been arrested in 2009 for sexual misconduct with a minor and was tried and acquitted in 2010.