This book surveys the Career in Teaching (CIT) initiative launched in Rochester, New York, looking at its impact on the district since 1987. CIT incorporates support for new teachers, provides opportunities for highly accomplished teachers to share their skills, and offers peer review and assistance to teachers experiencing problems in their practice. CIT has a collaborative structure, with roles for teaching peers, parents, and administrators. Teachers are the most actively involved in monitoring their professional peers and are the backbone of CIT. A vital element of CIT are the mentors who help guide and encourage new teachers, when attrition is usually the highest. CIT designates four stages in a teacher's career (intern, resident teacher, professional teacher, and lead teacher), providing programmatic supports and professional opportunities at each level. This monograph describes: the beginning teacher mentor/intern program; the professional support program for experienced teachers; the alternative evaluation program for teachers whose practice is not in question; governance of the CIT; Rochester's efforts to involve parents in evaluating teacher performance; and program effects. Five appendixes include an Intern Needs Assessment, Intern Status Report, Intern Mid-year Unsatisfactory Report, Status Report on Mentor, and Parent Survey. (Contains 20 references.) (SM)