The research study has focussed on the optimal use of instruction time to arrange for improved learner performance. A qualitative investigation was conducted using individual interviewing with six school principals and focus group interviewing with fifteen Heads of Department of six selected secondary schools. The findings revealed that the establishment of a sound culture of teaching and learning in which instruction time is used optimally is the joint responsibility of the school principal and staff in collaboration with learners and parents. Instruction time is lost owing to timewasters such as teachers who are unprepared for lessons, teacher and learner absenteeism and teacher and learner tardiness. Intervention strategies to counter the negative influence of timewasters on available instruction time relate to prior planning and preparation for lessons, managing teacher and learner absenteeism and the scheduling of extra classes. The study contributes to the discourse on effective teaching and learning for acceptable learner performance. / Educational Leadership and Management / M. Ed. (Education Management)