| Summary: | This research aimed at improving the mathematically representation skill of class A
semester IV students of mathematics education study program Muhammadiyah
Purwokerto University in academic year 2013/2014 in Transformation Geometri
subject using Geogebra Program media. This research belongs to action research
consisting of planning, implementing, observing, and reflecting. The data analysis used
was quantitative and qualitative descriptive analysis. The research showed that in the
first cycle, the number of students who got the minimal score 75 was 29 students of 40
who were present or 72,5% of the present students whereas, in the second cycle the
students who got the minimal score 75 were 33 of 38 who were present or 86,84%. This
result shows that the learning process using Geogebra media succeeded to improve the
students mathematically representation skill.
Keywords: action research, geogebra program, mathematically representation
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