Designed for use by computer programming teachers, this booklet presents the concepts of structured programming and provides examples of how to implement this methodology, which provides a systematic way of organizing programs so that even large and complex programs are easier to understand and modify than unstructured programs. After a brief introduction which discusses the history of programming languages, this guide presents a program written in an unstructured manner and then proceeds to develop the structured concepts and show how these improve the organization of the unstructured examples in both BASIC and Pascal. It then describes how to use structured programming with languages such as BASIC, which were developed before the structured methodology. After presenting additional examples (including the development of a gradebook program) and some extension to the structure concepts, the guide concludes with an appendix which discusses strategies for informally proving that programs work. (JB)