The primary focus of the research study described in this paper was to assess the status quo of teachers' use of Information and Communication Technology in teaching in terms of the factors that influence their use. Using a survey questionnaire, data was collected from a total of 1,891 secondary school teachers in all government schools in Negara Brunei Darussalam. Structural equation modelling, using AMOS 5.0 software, was employed as the major statistical analytic technique for a series of data analyses and assessment of the Theory of Planned Behaviour, the theoretical model that underpinned the study. Findings presented in this paper indicate that Bruneian teachers' use of ICT in teaching was influenced by their personal (attitude), social (subjective norms), and control (perceived behavioural control) factors.