Curricula in concentrated educational systems are prepared from an upper-stream reference and hand over teachers’ disposal. Curricula in Iran are compiled in the so-called math curriculum development office and then put at the disposal of teachers. The researches in this regard show that such plans provide some resistance against executing it which are named teacher - proof programs, even it changed to some extent for accept ion, its execution is suspeciable. This research first explains how math books of middle grade were changed as a result of investigations on TIMSS result in year 1995. These investigation show Iranian Books are weakness in problem solving methods as Polya had said. And so curricula developers in Iran tried to integrate Polya\\\'s method in math books and changed curricula based these frame work. Then, it shows how teachers treated these changes. The finding of analyzing the data has been collected in this research through observations and interviews. It is intended that teachers resist against these changes. Finally according to this research, we suggest a model which we refer if it is used through concentrated educational system, we could expect teachers tolerance against the changes would be decreased and so compiled curricula further matched to executed curricula.

Curricula in concentrated educational systems are prepared from an upper-stream reference and hand over teachers’ disposal. Curricula in Iran are compiled in the so-called math curriculum development office and then put at the disposal of teachers. The researches in this regard show that such plans provide some resistance against executing it which are named teacher - proof programs, even it changed to some extent for accept ion, its execution is suspeciable. This research first explains how math books of middle grade were changed as a result of investigations on TIMSS result in year 1995. These investigation show Iranian Books are weakness in problem solving methods as Polya had said. And so curricula developers in Iran tried to integrate Polya\\\''s method in math books and changed curricula based these frame work. Then, it shows how teachers treated these changes. The finding of analyzing the data has been collected in this research through observations and interviews. It is intended that teachers resist against these changes. Finally according to this research, we suggest a model which we refer if it is used through concentrated educational system, we could expect teachers tolerance against the changes would be decreased and so compiled curricula further matched to executed curricula.