Detailed Contents vii Acknowledgments xix About the Companion Website xx About the Book 1 Part I Introduction 13 1 Working with Diverse Students: Some Important Issues 15 2 Complex Factors That Influence Language Acquisition and Literacy Development 33 Language Sample Analysis I 60 Part II Developing Language and Emergent Literacies: Divergent Abilities in Infancy and Early Childhood (Birth to 5) 63 3 Acquiring One Linguistic System: First Language Acquisition 65 4 Acquiring More Than One Linguistic System: Multilingual First Language Acquisition 111 5 Acquiring First Language(s) with Difficulties 143 Language Sample Analysis II 177 Part III Developing Language and Literacies: Divergent Abilities in Middle Childhood (6-11) 181 6 Typical Development of Language and Literacies in Middle Childhood 183 7 Learning a New Language in Middle Childhood 224 8 Language Impairment in Middle Childhood 259 Language Sample Analysis III 282 Part IV Developing Language and Literacies: Divergent Abilities in Adolescence (12-18) 289 9 Typical Development of Language and Literacies in Adolescence 291 10 Learning English As a New Language in Adolescence 320 11 Language Impairment in Adolescence 354 Language Sample Analysis IV 369 Part V Theoretical Perspectives on Language and Literacy Development and Learning 375 12 Theories That Explain Language Acquisition and Literacy Development 377 Exit Self-Evaluation 405 Appendix: Examples of Standardized Language Assessments 408 Glossary 410 References 423 Index 448.