Widiawati, N.E. et al. 2026. Data-Based Instructional Leadership: A Strategic Model for Improving Multidimensional Numeracy at the Junior High School Level. Dinasti International Journal of Education Management and Social Science. 7, 3 (Mar. 2026), 3318–3327. DOI:https://doi.org/10.38035/dijemss.v7i3.6067.