AbstractThe aim of the present study was to investigate the effectiveness of study skills training on the qualitative academic achievement of girl high school students. This study was conducted by using an experimental design with pretest, posttest, and follow-up with the control group. The participants were 32 students from girl high school students of Tehran which were selected by cluster random sampling from girl high schools and then randomly assigned into control and experimental groups (Each group consisted of 16 students). The instruments used were Dortaj Qualitative Academic Achievement Questionnaire and Motevalli Study Skills Training Module. The experimental group received 8 sessions of psycho-educational group therapy and the control group did not receive any training. Two-way repeated-measures ANOVA was utilized for the analysis of data. Results revealed that there was a significant increase in qualitative academic achievement between pretest with post-test and follow-up among the .....