This paper presents the model, The Mathematics Teacher's Specialised Knowledge (MTSK). It acknowledges earlier contributions to understanding and structuring teachers' knowledge, in particular, the special debt owed to Shulman's notion of pedagogical content knowledge and to Ball and collaborators' Mathematical Knowledge for Teaching (MKT) influential for the specialised nature of one of its sub-domains. Our research with teachers has led us to explore the characteristics of MKT and to refine the descriptors relating to its sub-domains, a task which has underlined the difficulty involved in unambiguously delimiting the boundaries which separate these. As a result, and taking into consideration a broader view of the specialised nature of the teacher's mathematical knowledge, we propose a framework which, whilst respecting the major domains of Content Knowledge and Pedagogical Content Knowledge, regards the specialisation in respect of mathematical knowledge as a property which is inherent to the model and extends across all sub-domains.
Resumen El profesor desempeña un papel crucial en la articulación de los Espacios de Trabajo Matemático. El modelo de conocimiento del profesor que aquí se presenta (denominado Mathematics Teacher’s Specialised Knowledge) propone una estructuración de dicho conocimiento basada en la noción de ‘especialización’. Esta estructuración, particularmente la consideración de sus componentes (subdominios), permite comprender el conocimiento que el profesor pone en juego en la transición entre los distintos Espacios (idóneo, personal y de referencia) de Trabajo Matemático, así como las relaciones entre estos.
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