While much of the e‐learning development at universities in the past 15 years has been on institutionally supported Learning Management Systems (LMSs), alternative educational technologies are being taken up following the rapid growth in emerging technologies, including social networking sites (SNSs). While teachers may choose educational technologies based on their beliefs, change in beliefs, and thus the technology teachers use, can be difficult. This longitudinal research examines how one teacher changed from teaching fully face‐to‐face to teaching through blended learning, initially using an LMS, then an SNS. The focus is the change in the teacher's e‐learning beliefs and practices following her initial reluctance to use an SNS, which she attributed to her gender, age and education. Four key findings are highlighted. Firstly, while it can be difficult for teachers to change their beliefs, critical unmet expectations can usefully stimulate dialogue and collaboration, leading to change in beliefs and practices. Secondly, development of e‐learning resources on an SNS may follow an iterative process, involving experimentation. Thirdly, gender, age and prior experience may affect teachers taking up e‐learning, especially emerging technologies such as an SNS. Finally, this study has demonstrated the value of using longitudinal, qualitative research to understand change in a university teacher's e‐learning beliefs and practices over time.