Teachers’ conceptual subject
matter knowledge of stoichiometry
is a global concern. Such knowledge is contextually dependent, as
is the feasibility of attaining particular outcomes during in-service
teacher education workshops. In an attempt to understand what is feasible in various contexts,
I explore the relationships between South African physical sciences
teachers’ environments, education, and teaching experience
and their possession of, and ease with which they learn, various types
of stoichiometry knowledge. This is done through the analysis of the
pre- and posttest and biographical survey data obtained from 184 teachers
who attended a two-day stoichiometry workshop. The findings suggest
that teachers teaching in contexts of poverty, particularly when lacking
a B.Sc. degree, show a particularly high preference for algorithmic
over conceptual knowledge. The success with which the teachers in
the sample learned facts about relationships between concepts during
the two-day workshop suggests that such an approach could provide
an entry point into currently less feasible conceptual learning. No
correlation was found between extent of tertiary chemistry study and
stoichiometry subject matter knowledge, even for teachers with a B.Sc.
degree. Statistically significantly higher levels of stoichiometry
knowledge were found for the following teacher groupings compared
to their counterparts: teaching in a school serving a socioeconomically
more advantaged community; having over three years’ teaching
experience; possessing a B.Sc. degree. The suggestions derived for
in-service teacher education targets are likely to have relevance
in developing countries and in developed countries where considerable
socioeconomic differences exist.