The effect of Control Factor from Schoenfeld’s Viewpoint on Students’ Errors Based on Hodes Nolting Model in the Topic of Function for 11th Grade mathematics Field in Karaj County’s

The purpose of this study is The effect of Control Factor from Schoenfeld’s Viewpoint on Students’ Errors Based on Hodes Nolting Model in the Topic of Function for 11th grade mathematics Field in Karaj County’s. This study is a semi-experimental one. The population of this study consists of all male students in 11th grade of Karaj, distrct 1 within the educational year of 1399-1400. Two 25-student classes were selected based on convenience sampling out of all above-mentioned population. To collect the data, two researcher-made tests were used for the two stages of pre-test and post-test, to evaluate the effect of applying Schoenfield control according to the students' Hodes Nolting error model.The term “control” is defined as major decisions with respect to selection and use of resources and approaches. Hodes Nolting errors consist of careless errors, conceptual errors, application errors, and procedural errors. For the reliability of the test, the Cronbach's alpha value for the pre-test was about 0.702 and the post-test was about 0.824, and for checking the validity of the test, the CVR coefficient was used and the value was 0.8, which is acceptable. The results showed that applying Schoenfeld’s control could significantly reduce students' errors in the subject of function according to Hods-Nolting model.