Abstract
Students' difficulties in learning about limits hdve been documented by many
authors. Cornu, Tall, and Dubinsky all emphasise the process of encapsulation,
whereby a dynamic process becomes transformed into a static concept image. Tall
and Gray also place importance on the "proceptual" nature of mathematical
thought. I report on the early stages of a study that is designed to access student
schemas in limit problems.
25 students in a second year university numerical analysis class were given a
questionnaire that probed aspects of their understanding of limits. The schemas of 5
of these students will be examined using clinical interviewing techniques over a 4
week period. The numerical analysis course uses spreadsheets instead of a
programming language, and one of the longer-term aims of this research is to
determine the effect of regular use of a spreadsheet on students' concept image of
limits.