Proceedings of a seminar on the developmental justification for British investment in English language teaching (ELT) as part of its overseas technical assistance program are presented in the form of papers presented, summaries of presentations, and case studies. The keynote address, "The Economic Benefits of English Language Teaching" (Roger Iredale) is presented in its entirety. Topics of the sessions summarized include: a study evaluating the effects of ELT programs; the role of communication skills projects in economic development; socioeconomic aspects of ELT for development; perceptions of the social and economic impact of ELT in development; and linguistic imperialism. Case studies are for Yemen, Ivory Coast, Kenya, Uganda, Peru, Malaysia, Cameroon, and Sri Lanka. Appended materials include results of a survey of ELT teachers and teacher-trainers; a summary of four case studies relating to the session on perceptions of program impact; and a seminar schedule and list of participants. (MSE)