The multiunit elementary school is an organizational structure for elementary schools which incorporates shared decision-making into its operations. The school's Instructional Improvement Committee (IIC) serves to link the teaching and administrative levels of the school by having teacher representatives and the principal share the responsibility for formulating decisions, plans, and procedures which coordinate the school's instructional program. A study was conducted to determine the variables which associate with operationally effective IIC's. The results of the study revealed a significant correlation between IIC effectiveness and the interrelationship of the IIC chairman's leader Consideration and Initiation of Structure behaviors and IIC chairman--IIC member compatibility. Other variables such as attendance at workshops, chairman's administrative experience, or the amount of meeting time were not significant. (WS)