A discussion of bilingual education begins with a look at theoretical issues and then describes a community bilingual education program in London. Issues addressed include the distinction between additive and subtractive bilinguality, the relationship between contexts and outcomes of bilingual education, the cognitive and academic effects of different forms of bilingualism, social network analysis, the integration of macro- and micro-logical levels of analysis, and the role of ideology in education. The project described is a two-way bilingual education program where both majority- and minority-language children learn through the mediums of the majority language (English) and one important minority language (a Cypriot dialect of Greek). All children involved in the program receive half of their instruction in one language and half in the other. The project will study the effects of this bilingual teaching and learning experience on the linguistic, cognitive, affective, social, cultural, and educational development of majority and minority children and the community as a whole. (MSE)