Procedures used in securing the cooperation of states and schools for the 1990 Trial State Assessment Program (TSAP) of the National Assessment of Educational Progress (NAEP) are described. These include procedures for: (1) the 1989 Field Test; (2) the training of local administrators and quality control monitors; and (3) scoring and processing answer booklets. Each participating jurisdiction selected a State Coordinator. At the local level, a Local Assessment Administrator was responsible for preparing for and conducting the assessment session in one or more schools. The NAEP hired and trained a State Supervisor for each state to work with the State Coordinator. Quality Control Monitors (four per state) were hired by the state collection subcontractor. The 1989 Field Test in 27 jurisdictions gave states an opportunity to rehearse for the 1990 TSAP in 40 jurisdictions. Processing and scoring for the 1990 TSAP involved 107,337 assessment booklets and 20,225 teacher and excluded student questionnaires. After collection, scoring was done by extensively trained readers of the 1990 National Program of the NAEP. Transcription of student responses into machine-readable form was achieved through data entry, validation, and resolution and storage. Three tables present study data. (SLD)