Tutor

A tutor is a person employed in the education of others, either individually or in groups. To tutor (as a verb) is to perform the functions of a tutor.

Shadow education is another name for private supplementary tutoring that is offered outside the mainstream education system.

Private tutoring can help high achievers reach new levels. It can also help slow learners keep up with their peers. In order to provide children with educational advantages, the use of private tutors is spreading and intensifying.