Part 1 The educational development of bilingual children; Section 2 Metalinguistic and cognitive development; Chapter 1 ::; Chapter 2 ::; Section 33 Bilingual education; Chapter 3 ::; Chapter 4 ::; Chapter 5 Linguistic interdependence: a central principle of bilingual education; Section 3 Programme planning for bilingualism; Chapter 6 ::; Part 2 Bilingual proficiency; Section 4 The construct of bilingual proficiency; Chapter 7 ::; Chapter 8 ::; Section 5 The assessment of language proficiency; Chapter 9 ::; Chapter 10 ::; Section 6 A synthesis; Chapter 11 Towards a theory of bilingual proficiency development;