Cornell Class Reasoning Test (1964), by Robert H Ennis, William L. Gardiner, Richard Morrow, Dieter Paulus, and Lucille Ringel. Illinois Critical Thinking Project, Champaign, IL. Available at no cost. Developed for research purposes, but usable in standard classrooms. The research report with considerable data is Critical Thinking Readiness in Grades 1-12 (USOE Cooperative Research Project #1680), New York State College of Agriculture, Cornell University, 1965 (ERIC Document # ED 003 818). Aimed at grades 4-14. Multiple-choice. Tests for a variety of forms of (deductive) class reasoning.