The dictionary defines a tutor as a person who gives individual, or in some cases small group, instruction. The purpose of tutoring is to help students help themselves, or to assist or guide them to learn.
It permits students to advance at their own pace without embarrassment, and it takes each student at his (her) level of proficiency.
It allows the instructor to concentrate on each student's specific needs, goals, problems, or weak areas.
It is an individualized, systematic, structured learning experience, and provides opportunities for intensive practice.