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)

A process-oriented approach that can be highly successful in introducing students to computer systems concepts and terminology in an integrated manner is presented. (MP)

Guidelines designed to aid in a systematic approach to the selection of hardware and software for classroom use are presented. This information is a portion of the information provided by a Multi Media Training Van supported by the Pennsylvania Department of Education. (MP)

This section indexes a list of the products reviewed by "Creative Computing" over the last several years. Listed are: (1) product and manufacturer; (2) type of review; (3) volume, issue number, and page; and (4) information as to whether the back issue containing the information is available. (MP)

Some of the important concepts in recursive programing are detailed, along with how they can be used. Examples are provided to show how to program recursively in BASIC. (MP)

A mathematical technique for solving for the interest rate of a given annuity is explained. The technique is applied to a BASIC program that finds interest rate given the future value, number of payments, and the value of the payment. (MP)

A program written for the 16K Level II TRS-80 computer that prints a star map, using various mathematical formulas to compute positions of the stars and the moon and displays them on terminals, is discussed. Some relevant astronomical background and terminology are covered in order to aid understanding. (MP)

This article and chart compare 12 computers starting at $200 to $1500. The addresses of the 11 manufacturers are provided along with basic information on each machine. (MP)

A program designed to calculate pi using a Monte Carlo simulation based on "throwing darts" at a quarter circle of unit radius inscribed in a unit square is presented. (MP)

A teaching strategy for problem solving with computers is detailed. The approach provides a "midline" level of help that encourages exploratory activity yet provides enough guidance to increase chances of pupil success. (MP)

Presented are some guidelines for making intelligent selections when buying computers. The intended primary use of the equipment is seen as the primary point to consider when planning the purchase. Other important points to consider and possible sources of relevant information are noted. (MP)

This interview with the teacher of a computer course for elementary and junior high schools contains discussions of problems and rewards of such a course. The course is offered as an after school activity. (MP)

This reprint of one of the original Project Solo curriculum modules contains five problems and a computer program. (MK)

Several programs deemed good for preschoolers are reviewed, including some that require the child and parent to work the keyboard simultaneously. (MP)

The problems used in the Second Annual Computer Problem Solving Contest are presented. There are three groups of five problems, which corresponded to Elementary, Junior, and Senior contest sets. The contest questions are seen as interesting for individual study, and potentially useful to teachers of computer programing. (MP)