TY JOUR TI Master Class as a Form of Improving the Professional Competencies of a Teache KW master class KW advanced pedagogical experience KW professional competencies KW additional professional education KW training technologies JO Standards and Monitoring in Education AU Sabel'nikova-Begashvili, N.N. AU Damianova, E.V. AU Khudoverdova, S.. PY 2026 IS 14 PB INFRA-M Academic Publishing LLC.