This manual presents four assessments from Gary Kielhofner's occupational therapy Model of Human Occupation. The Interest Checklist, the Role Checklist, the Activity Log, and the Occupational Questionnaire are all designed to gather occupation-based data. These support the therapist in planning, documenting, and demonstrating the effectiveness of occupational therapy interventions. This manual provides guidance for client-centered application of the presented checklists, includes brief descriptions of the assessments, and offers information about the target population, preparation, implementation, and follow-up for using the instruments.