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Yuliani, Kiki; Saragih, Sahat – Journal of Education and Practice, 2015
The purpose of this research was to: 1) development of learning devices based guided discovery model in improving of understanding concept and critical thinking mathematically ability of students at Islamic Junior High School; 2) describe improvement understanding concept and critical thinking mathematically ability of students at MTs by using…
Descriptors: Concept Formation, Critical Thinking, Thinking Skills, Mathematics Skills