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)

Palindromic numbers (numerals that read the same backwards and forwards) are investigated. Examples show how palindromic sums can be obtained and a further analysis of these sums is made. (DT)

A method of showing the meaning of decimal fraction without using fraction words or notation. One technique described in detail uses large squares, strips, and small squares; using the metric system and decimal coinage is also suggested. (DT)

A small study showed that low ability students learned as much in three days' instruction as medium ability students in two days and high ability students in one day. The topic was base five numeration. (MM)

This column discusses problems involving a paper folding game for bicimals, the sum of exterior angles of polygons and polyhedra, solving quadratic equations in finite arithmetics, nomograms, and cube folding patterns. (DT)

Reviewed are the Avon materials and a set of kits for teaching the metric system. (MM)

Several examples of concrete applications of negative numbers are given. (MM)

A planning guide for a month's early education activities centered around Eskimos, their culture, and their environment. (AN)