Three supplements to the main report (December 1987) of the Task Group on Assessment and Testing in the United Kingdom are presented. The first report, "Reactions to the Main Report," examines the chief issues raised in public reaction to the main report. The national reaction has been largely positive and supportive. It is reaffirmed that to meet national curriculum objectives a balance is required between standardized tests and other forms of assessment, and that use of both externally prescribed and teacher-made tests offers the best means of securing standards, enhancing skills, and improving learning. The second report, "Application of the Framework to Individual Students," records the outcome of discussions with some subject specialists on the application of the proposed assessment framework to individual subjects. Specific advice is given with regard to attainment targets, performance levels, and aggregation of results. The third report, "A System of Support," presents conclusions about the implementation, administration, and support of the system needed for the national assessment framework. The general criteria that the organizational structure should meet and the functions of each body in the system are discussed. An appendix to the third report contains the case study illustrating program implementation in a large county school district. (SLD)