In this design study, we designed an instructional unit open to contextual modifications with the aim of fostering secondary school students' philosophical writing. Three philosophy teachers developed innovative source-based writing tasks and provided discipline-specific writing strategy instruction in their 10th grade class.
In this study, we focused on change. We explored teachers' interaction with the instructional design and studied teachers' views on how the intervention had changed their practice since a change of beliefs is crucial to successful, durable innovation of teaching. Moreover, we studied the effects of the changed practice, by exploring change in students' writing. An external jury analyzed students' texts to determine students' actual learning achievements. Teachers' insights into student progress were obtained from reflective interviews that featured comparisons between the observed and expected results.
The results showed that teachers judged the design to be feasible, valid, and effective for students' philosophical writing development. After the intervention, students' texts showed similar or even more independent philosophical thinking than before, while the tasks became more complex. Implementation drove teachers to contemplate writing instruction, indicating a change in their belief system, which is necessary for genuine improvement in teacher practice.