Until today my analysis is based on kerbrat- orecchioni (from the poliphonic theory); Pragmatic theory of human communication, and conversation analysis
The book authored by Suzanne Eggins and Diana Slade entitled "Analyzing Casual Conversation" might give you some idea to have different discourse analyses.
Critical Discourse Analysis (with 4 different methodologies championed by Fairclough, van Djk, Wodak, and Gee). Each of these would bring you their tools and ways of analyzing discourse, especially of a political nature.
Critical Metaphor Analysis: Charteris-Black (2004) and Maalej (2007). For an application of metaphor to discourse, see Maalej (attached) and for an application of metaphor analysis to teachers' narratives (applicable also to interviews), see ALGHBBAN, BEN SALAMH and MAALEJ (2017, attached).
Hola María Soledad, te escribo en español porque vi que eres hablante. Si estás estudiando las prácticas docentes en entrevistas a través del análisis discursivo, te recomiendo revisar los trabajos de Neil Mercer, B. Cazden, Gordon Wells y Alexander. Además, te sugiero dos artículos de Medina y Villalta que te pueden servir:
I should like to suggest adopting a pragmastylistic approach.This approach integrates pragmatics with stylistics by making use of pragmatic theories and issues like speech acts, conversational implicatures , politeness, pragmatic coherence, relevance, and the like to solve problems that cannot be solved by neither pragmatics or stylistics alone.You can through this approach discover which pragmatic aspect(s) is/are (a) stylistic feature (s) of teachers inside the classroom.Alternatively, you can explore which linguistic strategies are used to achieve the pragmatic aspects I referred to above. A more preferable option is to investigate them both to form a more vivid image about what you are after through analyzing the target interviews.Accordingly, your analysis will be both qualitative and quantitative one.