That's on top of seven other victims that he was originally accused of assaulting.
A grand jury returned a 28-count indictment against 59-year-old Vincent Root.
The investigation began last year when a former student accused Root of touching him inappropriately.
More alleged victims came forward after that, all saying they were assaulted inside classrooms at Chatsworth Elementary School in Woodland Township over several years.
Root, who was originally charged in October 2023, entered a plea of not guilty at his arraignment last week. He is free pending trial.