Results are presented, in the form of an annual report, of the standardized test performance of elementary and secondary school students in the Montgomery County Public Schools (MCPS), Rockville, Maryland. This year, as in the past, the report includes an update of the historical record of countywide test results on the Iowa Tests of Basic Skills (ITBS), the Cognitive Abilities Test (CAT), the Tests of Academic Progress (TAP), scores from the College Board tests (CEEB), and the data from the Maryland Functional Reading Test (MFRT). This year, the test report has been expanded to include: (1) a longitudinal analysis of the test performance of students attending MCPS in both 1976 and 1978; (2) a comprehensive report of test results for individual schools, including for each school an analyses of longitudinal data and of the variations in level of achievement; (3) an analysis of the four major tests used systemwide, discussing what the test scores mean and important limitations on their utilization; and (4) a glossary of technical testing terms designed to assist in understanding this report. A breakdown of test results by racial/ethnic groups and by sex is also included. (Author/GDC)