I found this article in wikispaces useful to help me better frame the purpose and structure of the reflective tasks in my learning design project.
For each task, in my storyboard, I marked it as having a particular level of reflection, to guide me when writing the materials to ensure that the questions, stimulus and framework for response would support an appropriate level of response.
The levels are descriptive reflection, dialogic reflection and critical reflection.
Descriptive reflection invites the learner to describe what happened or is happening, with some reasons or justifications but which remains a description of or report on that event. In the context of my course design this would involve a question that asked the teacher about concrete past experiences and skills and expected them primarily to set out the facts. Reflecting on my first programming lesson I might describe what had happened and the outcomes in terms of the progress students made.
Dialogic Reflection invites the learner to take a step back from just describing the event to also consider reasons for why things might have happened and what their impact may have been on the the event. Reflecting on my first programming lesson I might describe what had happened and the outcomes in terms of the progress students made and then the factors that had influenced the activity. For example I might want to describe how a large amount of time was lost in unpicking problems encountered by one or two students, meaning others didn't receive the guidance needed and possible reasons why those students got stuck and why that meant the rest of the class were left waiting.
Critical reflection asks the learner to take a more evaluative position, looking at what happened from different viewpoints to help understand what happened and why. For example I might want to describe how different sub-groups of students had reacted to the start of the lesson and why, and how my response had been in place, or absent for that, and what might have been done to keep the different groups on track and making progress.