Purpose: This paper aims at studying the effectiveness of training metacognitive skills on academic achievement among the first grade female high school students. Materials & Methods: The population consists of the first grade female high school students in Shirvan in the academic years of 2014-2015.The sample includes 40 students and divided into two groups of 20 who were randomly grouped in experimental and control groups. The students’ means in two semesters was used as the tools of this paper. The methodology used in this paper is quasi-experimental, in which both groups took a pre-test, and then, the samples in test group were taught the metacognitive skills in 16 sessions, and finally, there was a post-test for both. Findings: The results show that training metacognitive skills can result in increasing the students’ academic achievement. Discussion: In this context, it can lead to more interest in education and learning as well as acquiring appropriate skills and experiences and finally, academic achievement.
