The management problems of the implementation process of an Individualized Audio-Tutorial (IAT) learning unit in ninth grade biology in Israel are discussed. The sequence of the learning activities in relation to four problems which were raised during the implementation process are presented: (1) administrative problems at the school level; (2) administrative problems in the laboratory, classroom, or technical level; (3) classroom management problems; and (4) teacher-student behavior. These problems are identified as important because they have an impact on the reciprocal process of the implementation phase on one hand, and the formative evaluation of the learning units on the other. Four charts are included which provide: the scheme of a sequence of learning activities in an IAT lesson; sample card used by students to record their learning unit activities; the learning process of an IAT in a typical classroom; and a comparison of teachers' and students' behavior in conventional courses and IAT courses. A list of references completes the document. (Author/JB)