The 7-year-old boy was excluded by the school in August this year for a history of disruptive behaviour and serious assaults on other pupils.
A parent, who declined to be named, said she feared for the safety of her daughter and the 11 other pupils at the small school.
"This child has major behaviour problems," she said.
"He's physically violent towards other children without provocation. He poked another child with a pair of scissors, he whacked someone else with a paper weight, he hits, pokes and punches kids all the time - he'll hit you with anything he can find.
"He puts other children in jeopardy. He's dangerous and unpredictable."
Most of the parents at the school had expressed great concern about the boy's re-enrolment and planned to send their children to another school next year, she said.
"What happens if he picks up a pair of scissors and stabs someone in the head?"I fear that [re-enrolling him] will close the school down because there will be no more pupils."
She said the school and the board had done everything they could to help the boy, including employing a full-time teacher aide just to look after him.
"I feel sorry for him. He's a troubled boy.
"The boy has a right to an education, but not at our school. He needs to go to a large school where he is a small fish in a big sea. They can offer more support there. At the moment, he's got control of the school. It's only a small school and everyone's running around after him."
Other schools in the area had been asked to enrol the boy, but because he lived outside their enrolment zones, he was not eligible to attend their schools.
Tomahawk School's board of trustees met with Ministry of Education staff on Wednesday night to discuss their concerns about re-enrolling the boy, but the issue was not resolved.
After the meeting, board chairwoman Audrey Harbrow confirmed the ministry had told the school they must re-enrol him.
She said the board was complying with the ministry's order, but continued to express their concern and discomfort at the situation.
However, she was aware the situation involved a young person and their family, and their anonymity and privacy needed to be respected, she said.
Ministry of Education southern regional manager Michael De'Ath said the ministry had no plans to close Tomahawk School and would not comment any further on "individual cases".
They would continue to provide support and advice to the school when the pupil placement was made.
