This paper is based on experience acquired by the Family Discussion Bureau in residential training projects with social caseworkers who were both experienced and had received some professional training. The model has been developed over a period of ten years in annual three-week courses for experienced Probation Officers, but particular reference will be made to recent work with a group of senior caseworkers from a wide variety of settings. These are engaged in supervising the field-work practice of students taking professional courses at a number of provincial universities. The course for supervisors consisted of a ten-day residential period with two follow-up weekends at about six monthly intervals.