In this paper we describe two episodes of instructional interaction, in which examples are used in order to help students face their misconceptions. We introduce the notions of pivotal example and ...

IN making this collection, Mr. Tuckey has kept in mind the recommendations of the committee on the teaching of mathematics appointed by the Mathematical Association, and the result is seen in various ...

The numerous examples are interesting and suggestive, and all the answers are given at the end. We agree with the author in deprecating the undue employment of graphs, especially as the field in which ...