摘要：AbstractIntroduction:Academic achievement is one of the main variables of education, but it can be mentioned as a significant index to evaluate the quality of education. Usually academic achievement is evaluated by test results and the scores of students in different subjects are considered as their achievement level. In every education system, the achievement level of the students is one of the success indexes in scientific activities.Methods:The method of the study is a descriptive and correlation one. The sample group consists of 132 male and female high school students in Babol in academic year of 2011-2012 who randomly selected and divided into two groups: the students who participated in extracurricular classes and the students who have not participated in these classes. The tools of the study for data collection are achievement test obtained based on the average scores in both groups, a descriptive statistical method (mean and standard deviation), inferential statistics (one-way ANOVA, t-test and Spearman's correlation test) and the SPSS software.Results:Descriptive indexes indicate a significant difference between the total averages of male and female students. It means that female students in comparison to male students had a high achievement. In addition, the one-way ANOVA indicates that there is a significant difference between the scores of male and female students’ achievement who participated in extracurricular classes.Conclusion:Spearman correlation test results indicate that there is a significant difference between the achievement scores of students participating in extracurricular classes with students who have not participated in these classes.
