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This paper deals with the problem of how to provide effective and realistic hands-on information retrieval training to large numbers of end-users at a low cost. The DataLex research project has developed an information retrieval training system to teach lawyers and law students information retrieval. The training system is based on AIRS, a full-text retrieval system which can be configured to emulate STATUS, LEXIS and other retrieval systems of importance to lawyers. AIRS has been ported to a variety of microcomputers and mainframes that support the 'C' language. Training databases of selections of cases, statutes and secondary materials covering State laws (provided by CLIRS and State Governments), Commonwealth laws (provided by the Commonwealth), and English law (provided by Butterworths and LEXIS) have been created to provide a realistic emulation of legal databases. The training system is completed by an Australasian Legal Information Retrieval Handbook containing tutorials and exercises based on the training databases.