An instrument, combining the advantages of Piaget's individual concept assessment and criterion-referenced testing, was developed to test area conservation, area measurement and area subdivision of primary grade children. This Test of Intuitive Area Concepts was included with the Primary Mental Abilities spatial relations subtest and the Minnesota Paper Formboard Test in a battery to evaluate Tangrams, a unit developed by the Elementary Science Study, without specific objectives being stated. Students from a second grade class were randomly assigned to either the Tangrams group or control group, and both groups were given the battery as a pre- and post-test, and as a three month post-test. No attainable outcomes of the Tangrams unit could be identified in the short- or longer-term post-test results from this battery. (Author/AL)