eng Science and Education Publishing American Journal of Educational Research 2327-6150 2019-02-23 7 2 183 188 10.12691/education-7-2-12 EDUCATION20197212 article Syuhada Sitompul syuhadasitompul2615@gmail.com 1 Edi Syahputra 1 Kms. M. Amin Fauzi 1 State University of Medan, Indonesia The aim of this study are to, know the effect of Think Talk Write learning model with Batak Toba culture context toward student mathematical communication skill significantly, know the effect of beginning mathematical skill (High, Medium, Low) toward student mathematical communication skill, know whether there is interaction between (TTW, Conventional) learning model and beginning mathematical skill (High, Medium, Low) toward student mathematical communication skill significantly. The data analysis is done by two way of analysis variance (ANAVA). The result of study shows, there is effect of Think Talk Write learning model with Batak Toba culture context toward student mathematical communication skill significantly, there is effect of mathematical beginning skill (High, Medium, Low) toward student mathematical communication skill, there is no interaction between (TTW, Conventional) learning model and mathematical beginning skill (High, Medium, Low) toward student mathematical communication skill significantly. The test instrument of this study is student mathematical communication skill. http://pubs.sciepub.com/education/7/2/12/education-7-2-12.pdf think talk write learning model mathematic culture context communication skill