It may depend on the teachers' union contract (assuming it's a public school). A couple of years ago a parent in my district hired a math tutor to work with her son when he was really struggling. The school principal had refused the parent's request for in-school assistance from a learning assistance teacher, and the child's classroom teacher had also refused to provide any additional help. The tutoring quickly came to an end after the teachers' union filed a grievance. The gist of it was that only unionized teachers could perform regular teaching duties at the school during school hours.
