Siregar, N.C. and Girsang, C.N. 2020. The Effect Of Using Jigsaw Technique On Students’ Vocabulary Ability At Smp Swasta Kartika 1-2 Medan. Journal of English Education and Teaching. 4, 1 (Mar. 2020), 87–101. DOI:https://doi.org/10.33369/jeet.4.1.87-101.