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Pre-service Mathematics Teachers’ Mental Constructions of the Determinant Concept

Abstract This study aims to reveal the nature of mental constructions made by pre-service teachers whenlearning the determinant concepts and to contribute to APOS theory (Action, Process, Object and Schema) interms of instructional strategies. This is guided by the belief that understanding the mental constructions thestudents make when learning mathematical concepts leads to improved instructional methods. The data wascollected through a structured activity sheet and interviews. The findings revealed that the mental constructionsmade by pre-service teachers in most cases do concur with the preliminary genetic decompositions, and that manypre-service teachers are operating at an action/process stages, with the exception of the few operating at an objectstage. It also revealed that many students could carry procedures effectively, even if the meaning of the conceptis not constructed, which indicates that students mainly possess procedural knowledge of the determinant concept.