The Washington State Legislature requires that a sample of public school eleventh grade students be tested at least once every 4 years in the basic skills of reading, language arts and mathematics. A statewide assessment of eleventh grade achievement was made in 1981 using the California Achievement Test Form C. This report describes the procedures and results of the statewide survey. The specific subtest results include the areas of: (1) reading vocabulary; (2) reading comprehension; (3) spelling; (4) language mechanics; (5) language expression; (6) mathematics computation; and (7) mathematics concepts and applications. The appendices contain the mean raw scores and scale scores for each subtest and total battery and the complete item summary report for the assessment. (ML)