The author presents a method of producing a scatter diagram of data on two variables with Pearson product moment correlation of .50; he also provides a proof that the method will work for any number of data pairs. (SD)

The author illustrates many problems in which drawing graphs of functions involving absolute values assists in the solution of algebraic equations and inequalities. (SD)

Students, using the materials provided, can determine the number of diagonals, number of triangles formed by the diagonals, and degree measures of interior and exterior angles of regular polygons. The activity is designed to lead them to general formulae for polygons with n sides. (SD)

In this article, a continuation of SE 513 148, the author presents seven additional applications of group theory to high school mathematics. These applications can be used, not only to illustrate the group concept, but also to extend the development of ideas in the high school curriculum. (SD)

Rules for determining the number of initial zeros and the period of a repeating decimal are stated and proved. (SD)

The author describes several physical problems whose solutions involve a helix. He argues that students remember "offbeat" approaches to important mathematical concepts. (SD)

The author observes that checking the closure property is redundant for most number systems and therefore hard for students to understand. He defines several systems which are not closed, develops two concepts related to closure, and provides many related examples. (SD)

The author has surveyed eight popular algebra texts in order to determine the extent of sex bias in the problem sets. Her findings, which show that, by and large, word problems embody the usual sex stereotypes, are described in detail. (SD)