This paper describes a professional development program for teachers. The Certificate of Teaching and Learning (CTL), developed in Australia for Kindergarten through Year 12 teachers across all subject areas. It outlines the process of conceptualization, the dilemmas faced by the development team, and the final implementation across Australia. Action research, critical reflection, and self-assessment are central to the CTL philosophy. Participants design their own program of study with learning partners or mentors, select an assessor, and negotiate details of their learning assessment. The compulsory core unit provides a framework for the course, and instruments to assist participants in observation methods, discourse analysis, and action research. Two additional compulsory units, "The Learning Continuum" and "Student and Teacher Roles and Relationships," address learning models and theories, classroom ethics, and the role of relationships in teaching. Participants select an additional two optional units. Each unit includes course work and action research. The CTL was developed by a group of teachers, academics, and education consultants. Emerging from discussions with academics came the foci on the role of teacher as facilitator and collaborator engaged in action research, the emphasis on self-reflection using a CTL journal, and the consideration of participants' learning styles. Various methods used to implement the CTL are described, including distribution by the New South Wales Department of School Education to its 40 districts and possible inclusion in a Master's degree program. (Contains 34 references.) (KDFB)