Teaching Ohm's law in Grade 11 Physical Sciences using a Multiple Representations Approach

Abstract

The purpose of this study was to investigate the value of teaching Ohm's law in Grade 11 using a Multiple Representations Approach (MRA). The need to promote knowledge and skills in problem solving in Physical Sciences together with the use of technology is important. This study explored techniques of improving learner attainment thus ensuring that they achieve the minimum entry requirements for science related fields at university. Methodology A case study approach was used. The context is a rural high school in the Eastern Cape. The theoretical framework is constructivism and pedagogical content knowledge. It was a mixed method study with a sample of 48 Grade 11 Physical Sciences learners. Data was collected through a pre-test, an intervention and a post-test. The intervention lessons on Ohm's law were video-taped. A control group was taught using traditional teaching methods and the experimental group was taught using the Multiple Representations Approach. Post-test scores compared the achievement in the two groups. It was followed by focus group interviews with the learners in the two groups. Findings The study found that MRA improved learner attainment and assisted in overcoming learning difficulties. It assessed and developed a variety of learners' skills in different forms at different stages of the lesson. The study found that the MRA aroused learners' interest in science and assisted them to visualise the abstract concepts and this led to an understanding of difficult concepts. Recommendations The study recommends the use of MRA's by science teachers to increase learners' understanding of Ohm's law. It is recommended that teachers develop fun and interesting science activities to encourage the love of science among learners.