Can teachers use freud's theories

Yes. Convince children that their learning problems stem from a desire to have sexual intercourse with their opposite-gender parents (ex: boys with mothers, girls with fathers, as per Freud's Oedipus and Electra complex theories). Additionally, in parent-teacher conferences, be sure to explain this problem to the parents, and encourage them to be more actively involved in their child's educational needs, regardless of the potential legal ramifications. Remember, it's for the children!