摘要：AbstractThis study examined, ascertained and described the factors that influence the capacity of schools in providing quality Mathematics education, as perceived by school administrators and upper secondary Mathematics teachers in Brunei Darussalam. There were two methods of data collection used; namely, a pen–and–paper questionnaire and lesson observations of two teachers who were deliberately selected from the total sample of upper secondary teachers. The findings showed that teachers are at the heart of effective Mathematics education. However, the findings also revealed that there are negative factors affecting teachers’ effectiveness in teaching Mathematics. An awareness of these factors can help increase a teacher's effectiveness if they are dealt with successfully.
