Sulaiman, Herri, Fuad Nasir, and I. Robia Khaerudin. 2021. “Efektivitas Lesson Study Pada Pemecahan Masalah Matematis Melalui Perkuliahan Online Di Masa Pandemi Covid 19”. SJME (Supremum Journal of Mathematics Education) 5 (2). https://doi.org/10.35706/sjme.v5i2.4668.