Tambunan, Y.N. 2021. The Effectiveness of Learning Mathematics Through Explicit Instruction Techniques at Santa Maria Private Junior High School Parmonangan Academic Year 2020/2021. Jurnal Mantik. 5, 1 (Apr. 2021), 137-141. DOI:https://doi.org/10.35335/mantik.Vol5.2021.1289.pp137-141.