Theorisation implies some sense of critical assessment and synthesis of ideas. A discusses the implications of the position being taken. A discusses the generality of the proposed solution. A good discussion of the bibliography. In the action stage, students can apply the knowledge gained above in some pragmatic sense.
Action implies some sense of use .
I distinguish between action planning and action results . Assess the results. Could falsify the proposed position. Presents the results of an experiment and analyses those results.