A Research Report submitted to Faculty of Science, University of the Witwatersrand, in partial fulfilment of the requirements for the degree of Masters of Science. Johannesburg
July 2016.The study reported in this research report was motivated by the continuous poor performance by South African learners in physical sciences. This poor performance is evidenced by the below expectations year in, year out grade 12 physical science final examinations results. Several factors may be contributing to this poor performance such as lack of resources (both financial and human resources), overcrowding, ineffective teaching methods, and the language of teaching and learning. The assertion for this study was that teacher’s oral classroom instructional language impacts on learning of classroom science. The study, hence investigated how South African physical science teachers use their oral instructional language to enhance the understanding of science concepts.
The raw data was gathered through naturalistic observation and video recording of physical science lessons by two participant South African physical science teachers drawn from two different high schools located in the Gauteng Province. The two school were chosen on the basis of their matric results that are also below average. Follow up educator interviews were also conducted and video recorded. The videos of the lesson observations and educator interviews were transcribed verbatim and analysed.
The study revealed that the participant educators were not explaining the meanings of all technical and non-technical words that were used in the observed lessons. Teachers did not distinguish between the everyday meanings and scientific meanings of non-technical words used. Participant educators did not seek and make use of the participant learners’ pre-instructional meanings of non-technical words to help learners understand better the new scientific meanings of these words. One of the participant educators did not engage learners in the ongoing lesson talk.
The findings of this study will sensitise physical science teachers to important role of their oral instructional language to successful learning of science concepts in the classroom. This might help in ensuring science teachers use their oral instructional language effectively to enhance understanding of science concepts, by adopting teaching approaches that facilitate shared meanings of vocabulary used in science classrooms.
Key words: technical and non-technical words, instructional language, science language.LG201
