The States of Central America and South America are in the midst of an industrial development, which imparts new impulses to their educational activities. There is at once an awakened sense of the economic bearings of elementary or popular education and of the need of a readjustment of the work of the long-established secondary schools. Efforts in…

The purpose of the present experiments is to investigate the question of whether the physical match subsystem necessarily precedes the naming process. (Author)

The development of concepts of equivalence was studied in a group of 256 children, ages 4-8. The relative difficulty of these concepts is interpreted in terms of the young child's difficulty in understanding spatial arrangement and heterogeneity as irrelevant to numerical size. (Author/KM)

Presented are a series of word problems which give students the opportunity to use or develop problem solving skills. The problems are open-ended, with possible answers included. (JP)

Materials and learning activities for a broadened approach to number line study, measurement relationships, and slide rule instruction are described. (DT)

Cuisenaire, Dienes and traditional methods of teaching mathematics were compared by pre- and posttesting pupils in British junior schools during a three year period (1961-63) on mechanical and problem arithmetic, concept knowledge and attitudes. Details of the varied experimental design are given in addition to data and interpretation. (JP)

Finding patterns in the relationship between the number of sides in a polygon and the total number of diagonals is used as vehicle to discuss discovery learning. (DT)