The Preliminary Manual for the Portland Problem Behavior Checklist (PPBC) was developed to aid school personnel to identify problem behaviors, and to implement and evaluate intervention procedures to remediate or alter those problem behaviors. This manual describes the development, validation, administration, scoring procedures, and possible uses for the PPBC. The purpose of the checklist is to provide specific information to specialists and support personnel who may need to further evaluate or prescribe services to children. It is designed to identify and rate the specific problems which classroom teachers perceive to warrant professional intervention services. The checklist does not designate a specific treatment approach nor determine a specific diagnostic or placement category. Rather, it is intended to be used as a screening instrument or as a supplement in a more comprehensive evaluation process. Federal laws and most state laws require children to be evaluated by multidisciplinary teams of specialists using several types of assessment instruments before placement into special education programs. The identified problem behaviors may be used to design specific intervention programs for certified special education students or noncertified students with less severe problems. The targeted problem behaviors could be included in Individual Education Plans. (Author/PN)