The purpose of the paper is to describe how the Work System Method (WSM), developed by Steven Alter to facilitate the understanding between business and technical experts during Information Technology projects, is incorporated at several levels in Information Systems (IS) education. The work system method is one of the very few existing theoretical frameworks to support teaching of information systems published initially in 2002 and continuously evolving.  It provides a rigorous but non-technical approach to analyze the functioning of an organization as a socio-technical system before building an information system or just as an analysis methodology in industrial engineering, management or in the design of service oriented systems. The paper presents an overview of the work system method and related research including a review of publications on how it is used in IS education. Then are presented details on how the WSM ideas were used in the teaching of different types of courses in the IS program and lessons learned. Those are based on the 15 year experience of the authors in using WSM techniques  in various forms: as an approach for understanding and analyzing  problems in an introductory Information System course, as a method for systems analysis of the operations of an organization either in a Management course at masters level or as a step toward building a new Information Systems within a Systems Analysis and Design course and as a method for initial business analysis before developing an IS strategy project in the capstone IS course.