Abstract
A group of practising teachers implemented the Teaching for Abstraction method for the Year 8 topic ?Ratio and Rates?. The authors first constructed materials for a unit in which students explored familiar ratio and rates contexts, searched for similarities in their mathematical structure, defined the two concepts, and learned to apply these concepts to other contexts. After an introductory workshop, teachers taught the topic in six 1-hour lessons. They experienced considerable difficulties adapting the approach to the abilities and interests of their particular classes, but all students showed evidence of learning. It was concluded that, although Teaching for Abstraction shows promise, there are many factors that need to be taken into account if it is to be implemented in practice.
Mike Mitchelmore, Paul White and Heather McMaster