A lesson on a basic logarithmic property is presented, using geometric representations and limits of sequences. (MP)

Describes an instructional strategy to convey the elements of trigonometry to introductory physics students. (SK)

Based on the premise that most engineering students will own their own microcomputers, discusses the teaching of circuit analysis, possible directions to be taken in hardware analysis, and impact on the mathematics related to circuit analysis. (SK)

Two kinds of secret writing, codes and ciphers, are discussed. The weakness of a ciphering system mentioned in the March 1981 issue is pointed out, and an alternate method is presented. Programs written in BASIC are presented which can be used to encipher messages and help break ciphers. (MP)

Five problems on the generation and study of prime and related numbers are discussed. Solutions to the problems posed will be in next month's presentation. (MP)

Activities designed for pupils to read and draw distance-time graphs and use the slopes to draw conclusions about car speeds are presented. Worksheets designed for duplication for classroom use are included, and suggestions for supplementary activities involving speed-time graphs are provided. (MP)

A method of organizing data known as a stem-leaf plot is presented in detail. This method is viewed to overcome many of the disadvantages associated with the traditional methods of grouping in the frequency distribution table and provides a convenient introduction to data organization. (MP)

Ways of teaching students to read scales are presented as process instructions that are probably overlooked or taken for granted by most instructors. Scales on such devices as thermometers, rulers, spring scales, speedometers, and thirty-meter tape are discussed. (MP)

Describes mathematics of the nonliner relationships between a constant-speed, capstan-driven magnetic tape transport mechanism and a constant-angular-velocity take-up reel. The relationship, derived from the sum of a partial, serves in recognition of a finite tape. Thickness can serve as an example of rotational kinematics. (Author/SK)

A discussion of the mathematics of rugby is related to an earlier article about mathematics and the physical world. (MP)

Describes a variation of the familiar laboratory investigation on the spring and mass oscillator. (SK)

The introduction of an instructional computing strategy at Duke University that led to identification of three levels of user subsets and establishment of equipment clusters is described. Uses of the system in establishing computer literacy and special applications in chemistry, computer science, and the social sciences are reviewed. (MP)

Data from interviews with pupils who attempted to solve problems involving the appropriate weighing and combining of individual means into an overall mean is reported. For many, dealing with the mean seems to be a computational rather than a conceptual act, with many subjects unable to correctly carry out the task. (MP)

Some ways to link calculus instruction with the mathematical models used in physics courses are presented. The activity of modelling is presented as a major tool in synchronizing physics and mathematics instruction in undergraduate engineering programs. (MP)

Graph theory is presented as a tool to instruct high school mathematics students. A variety of real world problems can be modeled which help students recognize the importance and difficulty of applying mathematics. (MP)