Nasution, L.; Rizkina, S.; Ndruru, I. I. K.; Siddik, E.; Afifah, A. R. GUIDANCE IN THE DEVELOPMENT OF DIFFERENTIATED LEARNING TOOLS TO IMPROVE THE QUALITY OF TEACHING OF STATE ELEMENTARY SCHOOL TEACHERS IN GIDO DISTRICT, NIAS REGENCY. Hablum Minannas 2025, 4, 64-76.