This paper reports the implementation of a project designed to involve in service teachers in peer support for the learning of the core values of personal and social education so as to raise self-esteem, to enhance co-operation, to promote rationality and empathy. Project participants were 27 in-service teachers attending an undergraduate program of the Hong Kong Institute of Education. Project evaluation reveals that the project succeeded in generating for the teacher participants emotional, academic, social, technical, and extended supports, and that the benefits of the project also spilled over to their relationships with their primary school pupils and daily lives. Research and practical implications are discussed.[Copyright © 2003 The Hong Kong Institute of Education.]