"Individuals who have excelled in a particular subject can use their expertise to tutor others looking for some extra help. Interviews typically consist of subject-specific questions that will assess your academic proficiency. You should also expect to answer some behavioral and situational questions, such as how you would motivate a disinterested or discouraged student. Skills that are sought after include interpersonal, problem-solving, and goal-setting abilities."
I was asked to role play a tutor session. The interviewer was pretending to be a student struggling with factoring.
Avoid doing the work for them, try to guide them with questions (Socratic method). Show them all the tricks you know to make factoring easier on a different problem so they can learn the concept and then give it a try on their own with the initial problem.