The author presents research implications in the areas of geometric capabilities of elementary school students, instructional variables related to geometry achievement, transfer effects, and some findings concerning teachers and geometry. (JG)

Guidelines for helping teachers understand the informal geometry of the elementary school mathematics program are presented. (JG)

Describes a study to determine the relative effects of formal deductive presentations versus informal inductive presentations and the effect of the number of exercises completed with each learning set on seventh grade students. No reliable difference between the modes of instruction was shown; the number of exercises per set made no significant…

A definition is given for curves parallel to a closed curve. Equations for inner and out elliptic parallels are derived and explained. (RS)

Included are eleven short articles on various aspects of mathematics. (FL)

Article gives a brief history and suggestions for the proof of the theorem that of all plane figures with a common perimeter, the circle has the maximum area. (RS)