In the article the content and operational components of continuing professional development of public school teachers in Great Britain, Canada, the USA have been characterized. The main objectives are defined as the theoretical analysis of scientific-pedagogical literature, which highlights different aspects of the problem under research; identification of the common features of the content, models, forms and methods of continuing professional development of public school teachers. The legislative and normative framework of teachers' CPD in Great Britain, Canada and the USA, which determines the CPD content, has been highlighted; teachers' knowledge, skills, professional values and attitudes have been characterised; the key models, forms and methods of teachers' CPD have been defined. The teachers' CPD has been studied by foreign and Ukrainian scientists: models, forms and methods of teachers' CPD (L. Chance, A. Hollingsworth, D. Ross, E. Villegas-Reimers), non-formal teachers' CPD (J. Scheerens), continuing professional education (Ya. Belmaz, T. Desyatov), postgraduate education (A. Kuzminskyy, V. Russol), professional education (R. Hurevych, N. Nychkalo), teacher training (T. Koshmanova, Ye. Yevtukh), teachers' professional development (N. Klokar, V. Oliynyk). The research methodology comprises theoretical (logical, induction and deduction, comparison and compatibility, structural and systematic, analysis and synthesis) and applied (observations, questioning and interviewing) methods. The research results have been presented.