ขอเปเปอร์ค่ะะะ

Teachers’ Perceptions of the Impact of Continuing Professional Development on Promoting Quality Teaching and Learning
https://www.tandfonline.com/doi/pdf/10.1080/09751122.2015.11890332?needAccess=true

Professional Learning in the Learning Profession: A Status Report on Teacher Development in the United States and Abroad
https://eric.ed.gov/?id=ED536383

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