These guidelines for in-service and preservice teacher education related to the conversion to the metric system were developed from a survey of published materials, university faculty, and mathematics supervisors. The eleven guidelines fall into three major categories: (1) design of teacher training programs, (2) teacher training, and (3)…

Guidelines are given for designing teacher training for going metric. The guidelines were developed from existing guidelines, journal articles, a survey of colleges, and the detailed reactions of a panel. (MN)

An addition "trick," an analysis of why it works, and steps in constructing other problems of the same type from the basis of a discovery learning activity for addition. (DT)

Meanings of the word square'' are explored; the square as a figurate number, the sum of consecutive odd numbers, dissections of the square, and magic squares are discussed. (DT)