ASSESSMENT RESEARCH FINDING: Frequent and systematic monitoring of students' progress helps students, parents, teachers, administrators, and policymakers identify strengths and weaknesses in learning and instruction. COMMENT: Teachers find out what students already know and what they still need to learn by assessing student work. They use various means, including essays, quizzes and tests, homework, classroom ques- tions, standardized tests, and parents' comments. Teachers can use student errors on tests and in class as early warning signals to point out and correct learning problems before they worsen. Student motivation and achievement improve when teachers provide prompt feedback on assignments. Students generally take two kinds of tests: classroom tests and standardized tests. Classroom tests help teachers find out if what they are teaching is being learned; thus, these tests serve to evaluate both student and teacher. Standardized tests apply similar gauges to everyone in a specific grade level. By giving standardized tests, school districts can see how achievement progresses over time. Such tests also help schools find out how much of the curriculum is actually being learned. Standardized tests can also reveal problems in the curriculum itself. For example, a recent international mathematics test showed that U.S. students had encountered only 70 percent of what the test cov- ered. Freeman, D. J., et al. (l983). "Do Textbooks and Tests Define a National Curriculum in Elementary School Mathematics?" The Ele- mentary School Journal, Vol. 83, No. 5, pp. 50l-5l3. Good, T. L., and Grouws, D. A. (l979). "The Missouri Mathematics Effectiveness Project: An Experimental Study in Fourth Grade Classrooms." Journal of Educational Psychology, Vol. 7l, No. 3, pp. 355-362. Rosenshine, B. (l983). "Teaching Functions in Instructional Programs." The Elementary School Journal, Vol. 83, No. 4, pp. 335-35l. Rutter, M. (l983). "School Effects on Pupil Progress: Research Findings and Policy Implications." In L. S. Shulman and G. Sykes (Eds.) Handbook of Teaching and Policy (pp. 3-4l). New York: Longman. Stallings, J. A., and Kaskowitz, D. (l974). Follow Through Classroom Observation Evaluation, l972-73. Menlo Park, CA: Stanford Re- search Institute. ERIC Document No. ED l04969.