Several comparisons were made across educational level with respect to performance on each of the three NTE Core Battery tests--Communication Skills, General Knowledge, and Professional Knowledge. Various controls were implemented in order to discount selected threats to the interpretation of between- level test score differences as a function of teacher education. Several alternative analyses yielded results that were generally consistent with an interpretation of the Professional Knowledge test as a measure of students' knowledge of the teaching profession. A major limitation of the data on which the results are based was the lack of any specific information about the nature and timing of relevant course work. (22pp.)