This booklet focuses on screening tests that can be developed and used at educational assessment and resource centers, for assessment and early intervention with handicapped children and young people, especially in developing countries. The first part, titled "Guidelines on the Establishment of Educational Assessment and Resource Centres" by Kirsten Kristensen, offers a rationale and a procedure for establishing such centers for handicapped children, and describes the centers' functions and tools. Part II, "Methods of Testing and Teaching Handicapped Children and Youth in Developing Countries" by David Baine, addresses the importance of testing children by using items that assess skills useful in their own environment, notes that test development leads to the development of instructional programs, and advises that several assessment and resource centers should collaborate in producing suitable tests and programs. The final part, "Guidelines for Early Intervention Services" by Marigold J. Thorburn, discusses a rationale for early intervention, components of a system of preschool educational services, choice of early intervention models, early intervention technology, program personnel and facilities, and program organization and management. (JDD)