The problem of rounded numbers used in computations on digital computers is discussed and examples showing the effect of round-off errors are given. (DT)

Characteristics of computer arithmetic that may cause programing problems are considered. How numbers are stored in a computer, round-off error, overflow, and double-precision arithmetic are among the topics considered. (FL)

This article demonstrates an iterative method of evaluating the cosine function which can be derived using secondary school trigonometry. A sample computer run is included. (MM)

Methods of presenting a course on computers for average ability high-school students are outlined briefly. (DT)

The experimental use of interactive computer systems in a secondary school and the evaluation of this program are described. (SD)

Based on a nationwide survey of secondary schools (sponsored by NSF), the study describes the extent and degree of computer use for both administrative and instructional purposes. In covering instructional applications, the study also includes statistics on the nature and purpose of computer use; type of source and level of support; school…

This is a continuing column of the magazine; concern in this issue is on work that might be undertaken in a simple computer appreciation course for pupils aged 15-16. Answers to why to teach computer appreciation and how staffs may be helped are given, including 14 topics that the course would cover. (DT)

A unit on the quadratic equation is described. The discovery approach is used and the computer is integrated into the study of mathematics. (MK)

Experience with data processing must be included in courses dealing with computer science. A series of examples of data processing problems suitable for classroom use is presented. (SD)

Reported is a project designed to use the computer as the basis for a laboratory approach to the presentation of mathematics. Classroom instruction was augmented by student experiments in devising and testing mathematical algorithms on the computer. Research procedures for grades 6 through 12 focused on the following kinds of problems: (1)…