Abstract
3D Grapher application is a user-friendly application that supports learning to three-dimensional geometry. The purpose of this study was to determine the increase of students’ mathematical spatial ability by using the 3D Grapher application. This study uses quasi-experiment method with a tutorial model conducted on class VIII students one of junior high school in Bandung City. The instruments research by test and the research data were analyzed by t-independent test. Based on the results of research that improves mathematical spatial ability of students who get 3D Grapher based tutorial learning with an average n-gain score 0,56 better than students who get conventional learning with an average n-gain score 0,44. Thus learning through the 3D Grapher application can be used as an alternative to improve the mathematical spatial abilities.
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