Prospective Zimbabwean "A" level mathematics teachers' knowledge of the concept of a function.
Prospective Zimbabwean “A” Level mathematics teachers’ knowledge of the concept of
Maroni Runesu Nyikahadzoyi
The purpose of the study was to investigate prospective ‘A’ level mathematics teachers’
knowledge of the concept of a function. The study was a case study of six prospective
Zimbabwean teachers who were majoring in mathematics with the intention of completing a
programme leading to certification as secondary mathematics teachers. At the time of the
study the six prospective teachers were in their final year of study. Prospective teachers’
knowledge of the concept of a function was assessed through task-based interviews and
reflective interviews. These interviews, which were done over a period of three months, were
structured to capture the prospective teachers’ subject matter knowledge and pedagogical
content knowledge for teaching the concept of a function. The interviews were also meant to
capture the prospective teachers’ underlining pedagogical reasons for their choices of the
examples, representations and teaching approaches when planning to teach the concept.
As part of the study a theoretical framework for understanding prospective teachers’
knowledge of the concept of a function was developed. The framework, which was
developed, was used as an analytical tool in analyzing prospective teachers knowledge of the
concept of a function.
The results of the study indicated that the prospective teachers had a process conception of a
function although some of them had given a set-theoretic definition of a function in which a
function is perceived as a mathematical object. They also confined the notion of a function to
sets of real numbers. Functions defined on other mathematical objects (for example, the
differential operator and the determinant function) were not considered as functions by five
of the six prospective teachers.