One of a series of monographs providing information about the Delaware Model: A Systems Approach to Science Education (Del Mod System), this monograph describes the role of field agents. These agents are responsible for individual teachers who express a desire for involvement in improving teacher effectiveness and to be involved in the teaching of science. The ground rules for such a position are spelled out to include some of the things to avoid doing, such as anything that would infringe on the autonomy of the district, the confidence of the teacher, and the credibility of the field agent himself. Suggestions such as cooperation with administration, meeting with teachers, implementation of activities, suggestions for specific sessions with teachers, and various methods of proposing changes are described. References are cited. (EB)