Police said 24-year old Natasha L. Sizow used her cell phone to send illicit text messages and pictures of herself to students at Granby High School.
Sizow has been charged with two counts each of using a communication device to facilitate crimes against children. She turned herself in to authorities Tuesday night.
A first-year social studies teacher and girls' swimming coach, Sizow has been placed on unpaid leave pending the outcome of the investigation.
A preliminary hearing has been scheduled for April 2.
