The Effectiveness of Triangle Successful Design to Promote Student's Academic Performance

The aim of the present study was to evaluate the effectiveness of the partnership of parents, teacher and students on the academic performance of students in the 3th grade of high school. The method of the study was quasi-experimental with pre and post-tests and the control group. The treatment was "successful triangular" to evaluate the partnership of parents, teacher and students. The statistical population of this study was the students in the second and third grade of high school in Fars province. They were selected by cluster random sampling method among the cities. The sample consisted of 781 students who were selected from Shahed high school in Shiraz, Fasa and Kazeron. The data were collected and used by the workbooks of students in 2013-2014 and 2014-2015 academic years. In order to analyze the hypotheses, the Covariance Method was used as the statistical analytic method. The results of data analysis indicated that the application of "successful triangular" caused the improvement of student's academic performance. In applying the successful triangular among both groups, there was a significant difference in the academic performance of boys. In applying the successful triangular among both groups, there wasn’t a significant difference in the academic performance of girls.