RSA 627:6 Physical Force by Persons With Special Responsibilities.

I. A parent, guardian or other person responsible for the general care and welfare of a minor is justified in using force against such minor when and to the extent that he reasonably believes it necessary to prevent or punish such minor's misconduct.
II. (a) A teacher or person otherwise entrusted with the care or supervision of a minor for special purposes is justified on the premises in using necessary force against any such minor, when the minor creates a disturbance or refuses to leave the premises, or when it is necessary to prevent injury to self or others.
(b) In a child care program licensed or exempt from licensure under RSA 170-E, necessary force shall be limited to the minimum physical contact necessary to protect the child, other children present, the staff,