Stenhouse claimed that action research informed by theory made it possible to
synthesise teachers’ case studies as a source of pedagogical insights that can be cast
in propositional form, albeit open to revision in the light of an accumulating repertoire
of cases (1975, 157). He believed that such conditions could be achieved
‘through a mutually supportive co-operative research in which teachers and full-time
research teams work together’ (1975, 159). Although professional groups of teachers