The purpose of this paper is to present a 50-item instrument (Appendix B) designed to assess needs for elementary school substitutes. Its use may provide valuable information for inservice training of substitute teachers, the often neglected cadre of professional educators. A priori and a posteriori validation procedures are described. A factor analysis of 312 responses corroborated the existence of nine underlying factors reasonably congruent to the following nine subscales: (1) student information, (2) community characteristics, (3) building staff personnel, (4) school philosophy and policies, (5) school building physical facilities, (6) district and/or building procedures, (7) curriculum and instruction, (8) lesson plans, and (9) classroom discipline. A test-retest reliability index of .91 was calculated from the initial validation research. (Author/PN)