Tutorial and Instructor

noun

• A session of intensive tuition given by a tutor to an individual or to a small number of students.

adjective

• Of or relating to tutors or tutoring.
  • usage: "tutorial sessions"

(a.) Of or pertaining to a tutor; belonging to or exercised by, a tutor.

noun

• A person whose occupation is teaching.
  • synonyms: teacher

(n.) One who instructs; one who imparts knowledge to another; a teacher.