The effective use of an interactive whiteboard (IWB) in teacher-education institutions depends strongly on student teachers' intention of using it. Despite the recent surge in published research on the widespread applications for IWBs in teaching and learning, few have developed a model to elucidate the factors which influence student teachers' behavioural intentions (BIs) regarding the use of IWBs. The aim of this study was to develop a model which demonstrates the variables that affect student teachers' intentions and which also explain their interactions. The proposed research model is based on previous models of technology acceptance. Six variables (technology self-efficacy (TSE), performance expectancy (PE), effort expectancy (EE), social influence (SI), facilitating condition, and BI) were selected to build a model for this study. Structural equation modelling was used as the main technique for data analysis. The research model was found reliable and valid, the findings being based on a self-reported survey of 156 student teachers in Australia. Of the seven hypotheses which were formulated, five were supported by the findings. From the effect sizes, the dominant determinant of BI was found to be PE, this being followed by TSE, EE, and SI.