Frontmatter -- Table of contents -- List of abbreviations -- Chapter 1. Introduction -- Chapter 2. Conceptual considerations -- Chapter 3. Research methodology and study design -- Chapter 4. An ethnographic account of the study site -- Chapter 5. Classroom interaction 'under repair' -- Chapter 6. Directives in aid of classroom organization and educational talk -- Chapter 7. Interactive explaining as negotiating knowledge -- Chapter 8. Synthesis -- Backmatter