This paper wants to discover the role of teaching culture in type of teachers encounter to ‎modifications of math schedule of first grade of high school in Qaemshahr. Findings of ‎qualitative research by methodology of ethnography showed that teachers belief have been ‎evaluated to two positive perspective and critical perspective toward changes of math book ‎of ‎‏7‏th grade. Also they have presented two spectra of behavior in encountering changes in ‎math school books of the ‎‏7‏th grade: Full admission‏ ‏‎,‎‏ ‏Resistance and rejection. The research ‎results showed that understanding the culture of teachers is an essential factor to initiate ‎any reform that with improvement in attitude to change, teachers’ tendencies will be more ‎positive towards advancing ne schedules; it means that if teachers know the change useful ‎and necessary, they will perform them with more commitment and fidelity