The last of three volumes studying the relationship between writing research and instruction, this four-part report focuses on writing assessment. The first section details specifications for an instrument assessing student writing samples and the following composition skills: word processing, sentence processing, paragraph development, organizational skill, use of dictionary and reference sources, spelling, and writing mechanics. It also reports on the administration of such an assessment instrument to students from grades 1 to 6 in the Los Angeles Unified School District. The second section discusses specifications for competency based assessment of the following language arts skills: (1) listening, (2) grammar usage, (3) sentence structure, (4) capitalization and punctuation, (5) language expression, (6) spelling, (7) literature, and (8) study skills, media literacy, and nonverbal communication. The third section briefly describes the reading, mathematics, and language proficiency surveys and review exercises administered to entering high school students in the Sacramento City Unified School District, and the final section presents an annotated bibliography of assessment reports. (MM)