the impact of play therapy on academic achievement of children with mental deficiency of khorramabad exceptional elementary schools in academic year 1388-89

objective: the purpose of the current research is to determine the impact of play therapy on academic achievement of students with mental deficiency of khorramabad exceptional elementary school. method: it was a pre-test, post-test study design. 60 students were selected and according to their mental deficiency characteristics were assigned to either experimental or control group. each group consisted of 30 students. the research tool has been a teacher made achievement tool  the collected data,  were analyzed by co-variance analysis, and independent t-test. results: the results showed that; 1) the impact of play therapy on academic achievement of students with mental deficiency was meaningful (p<0/001). 2) the impact of group play therapy was more than individual play therapy. 3) the gender of the students didn&apos;t have any impact on their academic achievement.