In this study, the improvement stages of self-efficacy beliefs scale (SBS) which is improved in order to measure the level of self- efficacy beliefs related to Science and Technology Lessons that contents geography are presented in details After checking the content validity, the draft plan scale that was reduced to 22 items was administered to 328 students at Science Teachers' Department of Kırşehir Education Faculty. After validity and reliability studies required were conducted, a likert type scale was prepared to be used.