The Effect of Cabri Express in Geometry Learning on Students' Mathematical Communication Ability

Cabri is characterized by an attractive advantage and provides wide-ranging benefits in the teaching of mathematics. Although today there have been many studies on edges Cabri, experiments Cabri-Express not widely explored. For this reason, a quasi-experimental study with randomized posttest only design involving 80 grade VII junior high school students Ruteng, Indonesia, was conducted to analyze effect learning geometry students' overall mathematical communication ability (MCA) based initial abilities. The results MCA test are research data, which consists 5 questions that then analyzed t-test preceded conducting analysis prerequisite test. Hedges equation describes how much influence model has MCA. showed who were taught using help better than conventional model. From equation, size 1.23 obtained, indicating use Cabri-Expresses strongly affects These interpret ranked 13th experimental class equivalent those 5th control class. By clarifying MCA, recommends need mathematics classes. can also researchers explore other material relatable context.