Text in English / In a quest to identify best practices in teaching courses in English for Specific Purposes (ESP), this study investigated effective teaching of an online English module in an Open Distance Learning (ODL) environment. Although ODL is attractive to both students and lecturers, there are significant problems regarding how learning, teaching, interaction and assessment should be conducted in this context. The problems are exacerbated by the limited knowledge of using the online systems and constraints linked to time spent on tasks. The study adopted the qualitative research approach, using a case study design and data collected from three research instruments, namely online questionnaires, an online observation schedule and a content analysis schedule. The research population in the current study comprised students, lecturers, and e-tutors based at one ODL university. In order to engender best practices of effective teaching in an ODL environment, the Community of Inquiry (Col) framework and Zone of Proximal Development (ZPD) theory were applied to the research findings of the current study. The findings indicate that effective teaching of an online English module in an ODL context could take place when content is effectively structured; assessment reflects course content; there is teamwork and collaboration amongst lecturers; students effectively interact with the material, lecturers/e-tutors, and with each other. The findings of this study add to the volume of research on best practices for effective online ESP teaching in ODL higher learning institutions. / English Studies / D. Litt. et Phil. (English)