This paper describes a solution to the user identification and tracking problem within an educational World Wide Web environment. The paper begins with an overview of the Teaching Support System project at the University of Girona (Spain); the main objective of the project is to create an integrated set of tools for teachers to use to create and publish dynamic and interactive teaching materials that make use of the new possibilities offered by information technologies and the Internet. Functionalities of the Unit Navigation Module (UNM) of this platform that require user tracking and identification are summarized, and previous possible solutions are described. The adopted solution is then presented; the solution uses a Common Gateway Interface (CGI) compliant program running on the Custom Server (CS) machine that processes HTML pages before they are sent to the local (client) machine and inserts user identification within hypertext links. The CS also provides user identification and validation, HTML document customization, database maintenance, translation of database information into reports, control of private working documents, asynchronous and synchronous communications, and other similar capabilities. Three tables present standard log file contents, custom log file contents, and session tracking information. Two figures illustrate standard HTTP architecture and the proposed architecture. Contains 17 references. (DLS)