Ristida, R. 2022. EFFORTS TO IMPROVE THE QUALITY OF LEARNING THROUGH TEACHER ACTIVITIES IN DEVELOPING MATERIALS AS ONE OF THE REFERENCES AND LEARNING SOURCES IN SMA NEGERI 2 SIPORA. JOURNAL INTERNATIONAL ON GLOBAL EDUCATION. 1, 1 (Mar. 2022), 19–28. DOI:https://doi.org/10.31933/jige.v1i1.534.