The Effect of Cabri Software on Academic Achievement on Instruction of Topic of Angles in Circle

This study aim to examine the effect to academic achievement of cabri software’s in teaching of topic of angle in the circle to the seventh grade. in this study is apply the matching- only design, a quasi-experimental design, and there are two groups that experimental and control groups. computer aided instruction by cabri software is used in experimental group whereas traditional instruction is used in control group. simple random sampling, it is a random sampling method, is used in select of sampling. this study was conducted with seventh grade (n=48) student in academic years 2011-2012 at a secondary school in ağrı city. data collection tool is prepared academic achievement test that made up 20 multiple choice questions by researchers. pre test is used to before this study start and its result analysis by independent t- test in spss 16.0 packed program. there was no significant difference between groups. post test is analysis by one way anova. there was significant difference between groups in post test. the topic of angle in the circle’ instruction cabri software is more successful than traditional instruction