A nationwide sample of 49 school psychologists and 30 regular education teachers provided information on assessment for the purpose of instructional planning. School psychologists listed the types of information they collected for this purpose and teachers listed the types of information they considered useful. While some indications of agreement were found between school psychologists and teachers, there were also several inconsistencies in the views of the two groups regarding assessment procedures for instructional planning. School psychologists not only favored standardized tests, but also agreed to a considerable extent on the specific tests to be used. Teachers, on the other hand, did not agree as highly on specific tests. (Author/CL)