The purpose of this exploratory study was to evaluate the functional relation between initial sound awareness instruction and increased initial sound segmentation skill in children with hearing loss. Two preschool children with hearing loss participated in this multiple probe design single subject study. The children participated individually in initial sound awareness instruction (37-39 half-hour sessions). Assessment of children's initial sound segmentation skill occurred at the beginning of each session. Initial sound awareness training was associated with an increase in initial sound segmentation skill for the two children with hearing loss but performance did not consistently move to mastery level.