These guidelines are intended to assist high school psychology teachers in safeguarding the rights and welfare of students and experimental subjects while promoting high-quality instruction. There are three sets of guidelines. The first set deals with the use of animals in school science behavior projects. The major goal of such projects should be educational, i.e., they should teach about research procedures and introduce students to ethical issues in animal care and research. These guidelines do not apply to supervised student work in research laboratories. The second set of guidelines deals with the use of human participants in research or demonstrations conducted by high school students. And, finally, ethical guidelines for high school psychology teachers are presented. Complex ethical issues may be involved in experiments with human participants, experiments with animal subjects, self-disclosure in class discussions or activities, and questioning of personal or social values. Most of this last set of guidelines has been adapted from the American Psychological Association and the National Education Association codes of ethics. (RM)