This document is an updated version of NCGIA Technical Paper 91-20: The NCGIA Guide to GIS Laboratory Materials - 1991. This 1993 update includes approximately 40 pages of new or updated material, plus an appendix which contains a set of eight full-text GIS exercises. The document is a compendium of information pertaining to GIS laboratory education. Our objective is to provide resources which facilitate the establishment of a GIS laboratory curriculum. These resources include references to student exercises produced by the NCGIA, vendors, and other institutions; as well as aids for the creation of new exercises, including ideas for topics and sources of appropriate data.