The handbook is intended as an aid to teachers and administrators in developing English-as-a-Second-Language (ESL) programs for the kind of linguistically diverse student population found in international schools. It consists of a selection of essays on ESL program design and implementation and lists of additional resources. Essays include: "The International School ESL Challenge" (David Garner); "Some Theoretical Considerations" (Sandra Meakin); "Setting Up the ESL Department" (Fiona Kalinowski, Maurice Carder); "Organizing the ESL Programme: Which Model To Choose?" (Edna Murphy); "Features of the Programme" (Kalinowski, Carder); "Assessing the ESL Student" (Carder); "The Teacher's Task: The Work of the Classroom" (Garner); "Some Common Difficulties and How They Can Be Avoided" (Coreen Sears); and "The ESL Student with Special Needs" (Sherry Migdail). Information on additional resources includes lists of relevant professional journals, professional organizations and resources, publishers and mail order sources, useful books for the ESL library, computer software, teaching materials, and testing and assessment materials. A glossary and brief author bibliographies are also included. (MSE)