LUTVIANA. Implementation of a Teacher Performance Assessment System Based on the Ruang GTK Platform to Strengthen Teaching Staff Competence at SMPN 2 Karangrejo, Magetan Regency . International Journal of Science and Environment (IJSE), [S. l.], v. 6, n. 2, p. 820–828, 2026. DOI: 10.51601/ijse.v6i2.567. Disponível em: https://ijsenet.com/index.php/IJSE/article/view/567. Acesso em: 12 jun. 2026.