Learn-by-doing training environments are becoming more prevalent, and with them, the need to provide easy access to relevant information. One approach to providing such information is with an electronic information system. In this paper, we describe an information system designed for use in a particular training environment to deliver content to the learners. We focus on the indexing methods used to prepare information of various media for immediate use, as well as for open exploration. We present the training context that gave rise to this system, the challenges posed by this context, the indexing methods used to design and construct the information system, the lessons we learned, and finally our plans to extend the system.