think you did an excellent job with your triangulation matrix with three solid measures and data collection ( observation, formative assessments and questionnaires) each one will provide you with a different view point on your topic.

You wrote a third questions, and that is not needed. In AR we really just want two solid questions. If you have a third it is more likely to create confusion for the reader and the need to justify the difference between the questions. Another words, you could get into a sticky situation with too much data and questions to answer.

You write that “Triangulated data collection methods increase the validity of the research in concurrent, convergent, and construct forms”. This is an accurate statement, and one that we need to remember as researchers as it drives our research collection and ensuring that we have validity with triangulation. If you were reading a research proposal and it didn’t contain triangulation, would you call into suspect the validity of the study? Why or why not?