Data Analysis
The data were analyzed by using one of qualitative research analysis methodologies; content analysis. Once the responses were collected, they were complied and then, they were coded under each question. In order to ensure reliability of results, the methods of inter-rater reliability was used. That is, the complied data were coded by two experts; one is expert on mathematics education and the other one is expert on curriculum development. Codes emerged by two experts indicated similar results. The inter-rater reliability was high.