This study attempts to explain certain difficulties which ninth grade students face in tackling geometrical "problems to prove," by relating them to general and to specific rigidity and cognitive style variables. The results confirm the conceptual analysis of Geometric Rigidity (GR). (MP)

Seven major reasons to consider geometry as a basic skill are presented. (MP)

In this "thank-you" letter to Mr. Pascal, many applications for Pascal's triangle are pointed out. (MK)

Suggests that sex differences in spatial visualization and restructurization are confounded by differences in attitudes toward mathematics and mathematical abilities as well as by task and ego-oriented factors. Subjects were 86 male and female college students. (Author/MP)

Algebra is used to expand the historic construction of the arithmetic, geometric, and harmonic means to include the quadratic mean and a fifth mean. (MK)

Presented are suggestions for teaching metric conversion and the properties of quadrilaterals. (MK)

This study attempted to determine if teachers discriminate against female learners of mathematics. More than 1000 secondary mathematics teachers were asked to grade four geometry proofs. Student sex and ability were the independent variables. Analysis yielded no significant F ratios for either of the main effects or their interaction. (Author/MK)

Teaching ideas are presented on the following topics: the number line, earthquakes and Venn diagrams, homework, and flow proofs in geometry. (MP)

Suggestions for a geometric walk outside the classroom are given. The suggestions include: questions concerning functional shape, aesthetic shape, and geometric vocabulary; sketching a map; and activities to be conducted in the classroom after the walk. (MK)

Presents suggestions, for secondary mathematics teachers, for simple geometric constructions. The suggested constructions use only a straightedge and a right-triangular rule and could be carried out in the classroom. (HM)

Having students find and cut out of graph paper the 12 pentominoes can provide an enjoyable exercise in perception, discovery, and double checking. The pentominoes can then be used to illustrate informally several geometric concepts. (SD)

A number of paper-folding activities are described. The activities illustrate geometric concepts, theorems, and construction techniques. (SD)

A journal called the Ladies' Diary published from 1704 to 1841, presented mathematical problems, and solutions to the problems. The purposes of the journal are compared to those of Scientific American today. (SD)

A study examining performance differences on the Ohio Colleges Early Math Placement Test of students receiving algebra and geometry instruction in a traditional, year-long structure versus students in an intensified block structure found the traditional structure more effective. Using block scheduling for all courses and students is unwise. Some…

Discusses several dynamic geometry constructions with rectangles. Advocates use of software like Geometer's Sketchpad and Cabri Geometry for fostering fresh insight into traditional geometric theorems. Illustrates problem-solving methods not possible with pencil and paper. (MTE)