Abstract
Provisional results are reported here from developmental research on negative numbers in the upper grades
of primary school. An attempt has been made to deal with learning strands both on concrete magnitudes or
quantities and on formal constructs the observation of individual learning process is the core of the
research. The results show that - in the learners - a gradual shift takes place either from the realistic context
to the mathematical one or from the known mathematical context to the new one.
L STREEFLAND
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