This document comprises two leaders' guides and two participants' guides to two inservice presentations on the speech/language professional's role in working with at-risk infants and toddlers. Videotapes are intended to accompany the materials. The needs assessment, field testing, content/design analyses, and validation studies conducted in the development of the materials are described. The first workshop focuses on providing services to infants and toddlers in their homes or at clinical centers. The leader's guide includes sections which cover: instructions for the leader; purposes and overview of the program; assessment and intervention with the infant/toddler; assessment and intervention with focus on infant-caregiver interaction; and assessment and intervention with focus on the caregiver. A bibliography of 65 items is included. The other workshop presents the professional's role in working with at-risk newborns. Sections address: instructions for the leader; purposes and overview; the neonatal intensive care unit; the infant at risk for hearing loss; and primary prevention with parents and prevention with health professionals. A bibliography of 50 items is attached. The participants' guides provide parallel information, as well as information concerning services and descriptions of infant tests. (DB)