This survey of 22 secondary school libraries in southeastern Connecticut, conducted to determine the extent of school cooperation in cooperative library activities, quantified the schools which have the tools of interlibrary cooperation (union lists, directories, etc.) and identified the number of schools which engaged in specific regional cooperative activities. The survey also identified the perceived obstacles to cooperation, and indicated the importance of a delivery apparatus for interlibrary loan and a telephone in the media center. Several factors were analyzed as obstacles to library cooperation: (1) lack of staff time to coordinate activities, (2) board of education policy, (3) size of collections, (4) size of book budget, and (5) concern that the school would be accountable for lost materials. There seemed to be no direct relationship between any of the perceived obstacles and a school library's ability to engage in cooperative library activity. It is suggested that the attitudes of the individual library media specialists and their willingness to cooperate are the key factors in a school's ability to engage in cooperative activities. An 18-item reference list, six data tables, and a copy of the survey instrument accompany the text. (Author/JL)