1987. GEMS. Students explore the similarities and variations of fingerprints in these "fingers-on" activities. Students take their own fingerprints, devise their own classification categories, then apply their classification skills to solve a crime. The fingerprinting method does not involve ink, but a simple method using pencil and transparent tape. Several additional mystery scenarios are provided in the guide, along with background information on fingerprints. 72 pages, soft cover, b&w photos and illustrations. Three sessions, grades 4-8.