Strategies for winning in the game of NIM are discussed and explained through applying a base 2 representation for the numbers involved. (DT)

Given two interesecting lines, the "pencil" of this interesection is the family of all lines passing through the point of intersection. Presented is a characterization of all lines both in the plane and lying in opposite sectors of the plane as determined by one of the original intersecting lines. (JP)

A recreational activity providing practice in computation is described. Examples are provided and the underlying mathematics is analyzed. (DT)

Described is an activity demonstrating how a scientific calculator can be used in a mathematics classroom to introduce new content while studying a conventional topic. Examples of reading and writing large numbers, and reading hidden results are provided. (YP)

Modern sophisticated computers are shown to multiply the same way the ancient Egyptians did more than 4000 years ago--by doubling and adding. (MN)

Describes the method for verifying the accuracy of the shadow-stick method of determining east-west line with the shadow of sun. Description is also included for determining South by using a watch-shadow method. (Author/PS)

Enrichment topics dealing with solutions of polynomials over modular systems are described. (SD)

Forming whole numbers which read the same from left to right as from right to left is considered. A list of such numbers less than 1000 is included along with implications for instruction. (MN)

A discussion of the process by which pictures are secured from distant places by use of computers is preceded by a brief explanation of the binary number system. (MN)

The use of Cuisenaire rods to illustrate finite mathematical systems is presented. (CR)

Describes the Minnesota Talented Youth Mathematics Project for junior high school students in terms of participant selection, curriculum, teacher selection, course grades and credits, and outcomes of the project. (DS)