This study reviews current research on teacher mentors. Mentoring is defined as teacher-to-teacher coaching or counseling. The annotated bibliography covers articles that deal with: (1) descriptions and definitions of mentors; (2) mentoring as a vehicle used in teacher induction programs; and (3) the value of mentoring as a staff development tool. The points are made the training is necessary for mentors, that mentoring can reduce teacher isolation, and that mentors receive professional benefits through assisting other teachers. Research on various forms of mentoring is discussed and some recommendations are made. (JD)