Instructional practice plays a significant role in revealing how well teachers understand the subjects they teach. Many studies have been conducted in South Africa on the relationship between teachers’ knowledge of well-established subjects like Science and Mathematics and how well teachers apply their knowledge in the classroom. However, relatively little research has been done on the subject of Technology, which was only included in the national school curriculum after 1994. The aim of this study was to explore pre-service (i.e. in-training) Technology teachers’ content knowledge and instructional knowledge in the context of various theories about teaching. The study followed a case study approach. Five female pre-service Technology teachers, who were in their final year of teacher training at a South African university of technology and were doing their in-school practicum were observed. Video recorder was used to capture the delivering of a lesson to a class of Grade 8 learners. The researcher used the 9E instructional model, which comprises nine phases in the presentation of a lesson, as the basis for her observation work and final analysis. A key finding was that the content and instructional knowledge displayed by most pre-service Technology teachers was inadequate, which weakened their effectiveness in the classroom. As a result, learners were deprived of the opportunity to sharpen their cognitive skills and develop authentic interest in Technology. This study, though limited in scope, has laid an important foundation for more in-depth studies to be conducted on the extent of content and instructional knowledge in the sphere of Technology Education, which should be of value to other universities offering teacher-training programmes.