Abstract
Introduction: Group game therapy techniques along with individual techniques has a special place in the mathematical disorder treatment. The purpose of this study is to determining effectiveness group game therapy techniques on the mathematical disorder treatment on second and third grade elementary students in the 97-98 academic year.
Materials & Methods: this research has been done as an applied research context and it was an experimental kind with pre-test and post-test design that has experimental and control groups. Among students with mathematical learning disorder (introduced by schools), thirty people were selected by simple random sampling and they were divided into experimental and control groups. Both groups received 15 intervention sessions game therapy; with this difference that implementation of the intervention for the experimental group was performed in a group way and for the control group was performed individually.  Data before and after the intervention were collected using the mathematical academic performance test researcher-made. For data analysis multivariate covariance analysis was used.
Results: the research results showed that group game therapy techniques on mathematical learning disorder treatment has a positive effect (001/0> p).  Also group game therapy techniques compared with individual game therapy techniques does not have more impact on the process mathematical disorder treatment (419/0> p).
Conclusion: These results contains important implications for ministry of education and expert planners in learning disorders centers to treatment and mental health of students these results also can used to reduce costs in individual treatments and pay attention to group therapy.