This study was one of a series conducted by the Niagara Centre, Office of Field Development of the Ontario Institute for Studies in Education in 1969-70 as part of a major project entitled "Wider Public Involvement in Formal Education." In February 1970 a telephone survey of 100 Niagara region elementary schools revealed that 48 used volunteers in some aspect of their program. From March to June 1970 a project officer from the Centre visited 39 of these schools and interviewed the principals, using a structured questionnaire which covered such matters as the origin of the volunteer program, selection criteria, ways of recruiting volunteers, functions and tasks assigned to volunteers, effect of volunteer participation on pupils and on the role and work load of teachers, problems encountered, and future plans. An important part of the study was a detailed classification system which attempted to classify each volunteer activity according to the kind of pupil grouping involved, the kind of program, and whether regular or specific instruction was involved. In addition to summaries of questionnaire results, this report contains nine brief case studies and guidelines for conducting a similar survey which include a copy of the questionnaire and the classification scheme with directions for using each. (RT)