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 . IJSE [Internet]. 2026 May 27 [cited 2026 Jun. 12];6(2):820-8. Available from: https://ijsenet.com/index.php/IJSE/article/view/567