A method for systematically recording the process of family therapy (the Focal Therapy Record Sheet) is described, based on the focal approach developed in earlier papers by the authors. It demands a conceptual distinction between assessment of families and treatment techniques and embodies continuous evaluation of family improvement according to specific criteria. A detailed case illustration showing the Sheets completed for each of 14 sessions after two diagnostic interviews is provided, together with an anecdotal-style account. The value of the instrument for teaching purposes, in routine clinical work and for research is discussed.