List of Articles رویکرد شایستگی محور Open Access Article Abstract Page Full-Text 1 - Providing a Model to develop a model for school principals based on a competency-based approach (Case Study: Tehran Secondary School Mozhgan Farhadfar abolghasem delkhosh kasmayi Mahmoud Safari 10.52547/istd.31103.8.30.73 Open Access Article Abstract Page Full-Text 2 - Designing and validating an Instrument for measuring the professional competencies of student teachers based on a competency-based approach Zohreh Karami