A criterion-referenced test battery was devised for use with the mathematics program of the Mamaroneck Public Schools (New York) in 1971. After two annual administrations, the tests were revised in four ways. The format was changed, and the number of items dealing with geometry was increased; some items were revised to conform better with the curriculum and others were modified in the interests of clarity. Results on the revised tests are compared with those on the original forms. (SD)