This is one of a series of monographs providing information about the Delaware Model: A Systems Approach to Science Education (Del Mod System). The State Department of Public Instruction is the agency that represents the public schools of Delaware. The two branches of the state department with which Del Mod interacts are the Instructional Services Branch and the Auxiliary Services Branch, acting as service centers for school districts and areas of development and program evaluation, teacher certification, federal funding, needs assessment, pupil testing, research, and general supervisory assistance in areas of inservice education. The proposed plan of activities for the State Department of Public Instruction is briefly described as related to each of the above mentioned tasks. (EB)