Sorby, S. A.Baartmans, B. J.Wysocki, A. F.2015-11-112015-11-1119991017-4656https://doi.org/10.2312/egs.19991053Development and evaluation of 3-D spatial visualization skills is discussed. Strategies for improving spatial skills are presented and multimedia software being developed by the authors is described. Initial assessment data from beta-testing the software is presented.