The purpose of this study was to evaluate a programme aimed at equipping adult mine workers in the North-West Province in computer-based skills. The study describes how the use of computers for learning has transformed some of the mine workers in an Own-Time learning environment, where computers were integrated in their learning activities, compared to the Full-Time adult learning environment, which did not present a similar opportunity. The perspective of using a combination of two teaching methodologies in the Adult Education and Training (AET) curriculum provided at this mine sought to minimise the conventional didactic instructional approaches, whereby the facilitator does most of the talking while learners become passive listeners. Activity theory (AT), in tandem with the reviewed literature, was well suited as a theoretical framework for this study, since it takes a developmental view of minds and technological interaction in context. The activity system was used to map how existing work-related practices fitted into each component, which includes the subject, object, rule, community and division of labour. A case study was applied as a guiding design in the study in which seventeen mine workers participated. The computer activity was illustrated from multiple perspectives, using a qualitative approach and associated epistemologies and beliefs regarding the engagement with mediational tools. Boundary crossings, the zone of proximal development, and the eight-step-model from activity theory were used to scrutinise the learners’ beliefs, attitudes, knowledge, practices and contradictions. These important aspects assisted in obtaining data through participant observation, interviews and field notes. To discover patterns, concepts, themes and meanings from the notes and transcripts, data analysis was blended with these aspects. This study demonstrated the use of the above-mentioned methods at appropriate times. Without ideal and effective research methods, the quality of evidence of this study would have suffered and elucidations of connections would have been inadequate. The findings revealed that the AET programme made an impact on the company and on the individual participants, in their homes, their place of work, and their communities. Change in the workers’ performance after attending AET computer-based programmes was noticeable especially regarding their literate and numerate knowledge and skills. Contradictions and disturbances in the AET programme were also identified, and an intervention was proposed to facilitate a computer programme that includes the curriculum components such as mouse skills, keyboarding, data manipulation and desktop publishing. The study proposes that the AET policy needs to cover Own-Time learners, even though their learning is not obligatory, in the same way as it covers the Full-Time learners. A modified activity theory, contextualised for a situation such as that in the mine in question, was contributed in the study. Furthermore, some limitations and recommendations for future research were identified from the findings. The proposed AT for adult learners suggests a new way of exploring the practices of mind and technology interaction for adult learners, incorporating cultural backgrounds, age, language, values and beliefs as well as reflective decision making. / Science and Technology Education / D. Ed. (Comparative Education)