Abstract: This study was performed with the purpose of evaluating the level of effect of intelligent boards on mathematical learning of girl students in primary school in the county of Bahar. The method of this research was quasi-experimental with pre and post-test along with an experimental group. Statistical population consisted of all girl students at the Majesty Roghieh (greetings to her) school during the 2014-2015 academic year in fifth grade of primary school in the county of Bahar. Statistical sample in this study were two classes of 20 individuals each from a girl school. One class with 20 students was taught using the interactive board and 20 students in the other class received traditional teaching for 5 weeks. The educational material in this study was mathematics (geometry, quotients, writing numbers, mixed numbers and decimals and proportions) for fifth grade of primary school and instruments used included a 20 question pre-test and 4 question tests from every topic, after the experimental teaching in the two groups which was researcher formulated. Additionally in this research for evaluation of the reliability of the test, retest method was used and reliability for the pretest was obtained at 0.79 and for the post-test it was 0.86. Data analysis using pre and post-test scores was performed with independent groups’ t-test. Comparison of mean pre-test scores in the experimental and control groups showed that both were at the same level regarding topics in consideration in the course of mathematics and their pretest scores did not have meaningful difference. Comparison of mean scores of post-test between the two groups using independent t-test showed that group performance of students taught using the intelligent board in comparison with students taught traditionally in the mathematical academic progress test was significantly better.