The alleged crimes occurred between Oct. 1, 2016 and Feb. 4, police said.
Parents told WSOCTV that they planned with school leaders Tuesday morning. Several parents said they were notified about the arrest through media reports, and not through the school.
"The kids as it is don't have a voice and us as their parents, we have to be their voice," said Christopher Jennings, a parent of children with disabilities at McAdenville Elementary. "It is absolutely sickening."
Parents are calling for more transparency at the school and are worried there potentially could be more victims.
"Our kids with disabilities should not be treated any differently than a normal child," Amber Jennings said. "You need to realize if you're going to take on a position and be a special needs teacher you have to understand the children you're going to be dealing with on a daily basis."
Barker was released from the Gaston County Jail and after being placed under a $10,000 secured bond.