<![CDATA[This study aims to determine students' mathematical communication skills by using generative learning strategies and Group Investigation strategies in Mathematics in class VIII of MTs Swasta Al-Washliyah 55 Serbelawan. This study uses a quantitative research approach with quasi-experimental methods while data collection is carried out using test, interview and observation techniques. The subjects in this study were students of grades VIII-A and VIII-C of MTs Swasta Al-Washliyah 55 Serbelawan. Hypothesis testing with T Test and Analysis of Variance. The results of these findings are: 1) There is an effect of generative learning strategies on students' mathematical communication skills in class VIII MTs Swasta Al-Washliyah 55 Serbelawan. Based on the results of the T test analysis, the value of t count = 21,846 and the value of t table at the level (α=0.05) = 2.052, then t count > t table; 2) There is an effect of the group investigation learning strategy on students' mathematical communication skills in class VIII MTs Swasta Al-Washliyah 55 Serbelawan. Based on the results of the t test analysis, the value of t count = 24,363 and the value of t table at the level (α=0,05 ) = 2,052, then t count > t table; 3) There is no effect of generative learning strategies and group investigation strategies on mathematical communication skills in class VIII mathematics at MTs Swasta Al-Washliyah 55 Serbelawan. Based on the results of the analysis of the F test, the value of F count = 0.018 and the value of F table at the level (α=0.05) = 4.020, then F count < F table.]]>
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