Teachers' mathematical beliefs refer to those conceptions held by teachers on the teaching and learning of mathematics. Educationists have attempted to systematize a framework for teachers' mathematical belief system into smaller sub-systems. Most authors agree with a system mainly consisting of beliefs about what mathematics is, how mathematics teaching and learning actually occurs, and how mathematics teaching and learning should occur ideally. Certainly, the range of teachers' mathematical beliefs is vast since such a list will include all teachers' thoughts on personal efficacy, computers, calculators, assessment, group work, perception of school culture, particular instructional strategies, text books, students' characteristics and attribution theory, among others.