By enhancing control abilities, the problem solver can use most of his resources to solve difficult problems with greater efficiency, and in the case of lack of control abilities, his knowledge resources may be wasted or not utilized. The present study aims to investigate the role of Schoenfeld’s control factor in reducing the 10th grade math students’ misconceptions in geometry. This study is an applied, quasi-experimental research. The statistical population it includes all 10th grade math students in Baneh city in the academic year of 2018-2019, 40 of whom were selected as sample. Data were collected utilizing two standard researcher-made tests used in a pretest-posttest design. The validity of the questionnaires was examined by sixteen experienced mathematics teachers. Cronbach's alpha was used to confirm the reliability of the questions. The results showed that the control factor can play a role in reducing students' misconceptions in geometric concepts and problems.
