自我反思、同伴互助和专业引领是教师专业发展的三大支柱。调查显示,校长们普遍认为,缺乏专家和骨干教师是校本教研的主要困难。 Self-reflection, peer assistance and professional guidance are the three pillars of teacher professional development. According to the survey, principals generally agree that the lack of experts and key teachers is a major difficulty in school-based teaching and research.