5.Instruments
During collecting data we used a questionnaire which adapted for special education center. We applied questionnaire of Yenilmez ve Sarier (2007) ‘Opinions of the prospective teacher about computer aided mathematics education’ which improved in Turkish. These respondents rated each item as “Strongly Agree”, “Agree”, “Not sure”, “Disagree”, “Strongly disagree”. As a result of the analysis reliability of questionnaire found Cronbach Alpha number is 0.83. We applied 10 expert for questionnaire face validity. Also we used demographic information from to find out teacher’ abilities, characteristics and personal information.