SELLY, A. . TRAINING TO IMPROVE THE COMPETENCE OF 21ST CENTURY TEACHERS WITH A TECNOLOGICAL PEDAGOGICAL AND CONTENT KNOWLEDGE (TPACK) APPROACH THROUGH THE GOOGLE SITES APPLICATION AND MENTIMTER FOR CHRISTIAN HIGH SCHOOL TEACHERS 2 KALABAHI: PELATIHAN PENINGKATAN KOMPETENSI GURU ABAD 21 DENGAN PENDEKATAN TECNOLOGICAL PEDAGOGICAL AND CONTENT CNOWLEDGE (TPACK) MELALUI APLIKASI SITES GOOGLE DAN MENTIMTER BAGI GURU SMA KRISTEN 2 KALABAHI. Indonesian Journal of Engagement, Community Services, Empowerment and Development, [S. l.], v. 2, n. 2, p. 200–209, 2022. DOI: 10.53067/ijecsed.v2i2.59. Disponível em: http://ijecsed.esc-id.org/index.php/home/article/view/59. Acesso em: 12 may. 2026.