<![CDATA[This research aimed to find out the influence of cooperative learning model of think-talk-write type towards student’s mathematical conceptual understanding. The population of this research was all of 8th grade students of SMPN 34 Bandarlampung in academic year of 2019/2020 with 207 students that distributed into seven classes. The sample of this research were student of VIII C which consist of 29 students and VIII D which consist of 29 students who were selected based on cluster random sampling technique. The pretest-posttest control group design was used as the design of this research. The research data were obtained by the essay test of mathematical conceptual understanding on topic of number pattern. t-test was used to analyze the data with significance level . The result of this research show that enhancement on understanding students' mathematical concepts of student who follow learning with think talk write higher than understanding students' mathematical concepts of student who follow learning with convensional.Based on the results of the research and discussion, it was concluded that cooperative learning model type TTW was influenced student’s mathematical conceptual understanding.]]>
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