Wardini, S.U., Pamungkas, B.D. and Afifah, D.S.N. 2024. Development of Mobile Learning Teaching Materials on Opportunities to Improve Students’ Mathematical Communication Skills in Vocational High Schools. Journal of Instructional and Development Researches. 4, 1 (Feb. 2024), 1-10. DOI:https://doi.org/10.53621/jider.v4i1.272.