To Study the Effect of Combined Learning on Students' Educational Achievement in Mathematics

The main purpose of this research is "to study the effect of combined learning on students'educational achievement at girls' technical schools in Tehran". The research method in thisstudy is semi-experimental or semi-empirical. The statistical universe of this study includesall girl students of Tehran technical schools. At the first stage, 6 technical schools wereselected randomly and simply among all technical schools of the studied society and then 12classes of the first year were chosen (2 test and control classes in mathematics per school).The sampling method of the schools was a simple random case in this study. Totally 240students attended these classes. The applied tools in this research are writing fiches from pretestand post-test scores of the students. In fact, the educational achievement has been used bytwo tests of pre-test and post-test for both test and control groups. The results of t- test in thedependent groups show that there is a significant difference regarding the computedsignificance level and obtained mean difference in the educational situation of the test groupin the case of pre-test and post-test. Meanwhile, the study and comparison of the means intwo situations of pre-test (17.1394) and post-test (18.2279) also confirm this issue.