The "Hypermedia for Teaching" project is a European collaborative venture designed to produce a hypermedia learning package that is published on CD-ROM. Two versions of the package are to be developed. One of these is intended to be used on a multimedia personal computer (MPC), while the other is to be used in conjunction with commercially available CD-I (compact disc-interactive) equipment. The MPC version of the package is currently being developed, and the CD-I version is being designed. The two versions will share a basic common architecture: the topmost level provides the generic control mechanisms for the system; the second level contains activities modules, either common core (dealing with a particular aspect of hypermedia theory, design, or practice) or application (dealing with the use of hypermedia methods within a particular domain); and the lowest level, documents, which make up the basic building blocks of the overall system. It was discovered that simple book and page structures, backgrounds, fields, graphic objects, and groups could be easily created using the basic set of tools provided by the ToolBook implementation language. The creation of a CD-ROM prototype disc involved four main stages: local testing and emulation; data transportation; building a disc image on magnetic disc; and transferring the disc image to a recordable compact disc using either a single session or multi-session CD recording unit. Several difficulties arose during the project: end-user interface design issues; consistency of treatment, consistency of style, and programming efficiency of scripts, modules and the CD-ROM; and limited resources. (Author/MAS)