An approach to the proof that not all angles can be trisected which is elementary enough to present to senior level high school students as well as undergraduates is given. (MN)

Five characteristics necessary for a computer puzzle to be considered ideal are listed along with an example of such a puzzle. Several other puzzles lacking some of these characteristics are also listed and discussed. (MN)

Finding the sum of all n digit whole numbers that can be formed from an n digit whole number is proposed as a useful classroom activity. The problem leads from inductive method to deductive proof with the aid of pocket calculators, and provides an opportunity to introduce factorial notation and permutations. (MN)

A discussion of problems directly concerned with the secondary teaching of mathematics touches upon pupils in the 60th-90th percentile range of ability, the Certificate of Secondary Education, and the feeder middle schools. (MN)

Relationships between the linear dimensions, surface area, and volume of parallelepipeds are examined. (SD)

Introducing variety into the high school mathematics classroom by using activity units and small groups work is discussed. (DT)

An activity that offers computational practice, pattern recognition, and the formulation of generalizations is described. (JT)

Three biorhythm cycles affecting behavior are discussed and graphed by using basic mathematical operations along with simple graphing techniques. (JT)

Ten problems involving large calculations are described for classroom use with a calculator. (JT)

A familiar Christmas song described as a second-year algebra problem is presented in "The Twelve Days of Christmas". Five strategies for solving inequalities are discussed in "Solving Algebraic Inequalities". (JT)

An activity involving totaling bills, completing checks and check stubs, and determining bank balances is described. (JT)

The probabilities of six-card poker hands are derived and compared to those of the five-card poker hands. (JT)

A computer program which produces a print-out of one million items is given in elementary Fortran. Observations of the print-out help students relate to such a large-number concept. (JT)

The construction of geodesic domes of four different sizes is explained. (JT)

Examined is a method of teaching based on the idea of the projective application of mathematics to simplified innovative proposals and hypotheses. (Author/MA)