Three-dimensional spatial skills have been shown to be critical to success in engineering and other technological fields. Well-developed 3D spatial skills are particularly important for success in engineering graphics courses. Further, 3D spatial skills of women lag significantly behind those of their male counterparts, which could hinder their success in engineering graphics. Michigan Tech has been offering a special course aimed at improving the 3D spatial skills of engineering students, particularly women, since 1993. In a recent study, the materials developed at Michigan Tech were tested with a group of middle school students. This paper will summarize the findings obtained from our outreach to middle school students. Future plans for testing with additional K-12 audiences will be discussed. (Contains 6 tables and 3 figures.)