Methodology
I see this study at the moment as a Case Study, possibly using mixed methods. A quantitative parent survey could lead to qualitative in depth interviews with selected parents. In terms of the parameters of the study, I think it will be much more manageable if I look at the set of parents from one classroom in depth, rather than casting the net too widely.
Maybe in the conclusion? I could say something like:
This is what I found out in this particular setting from this set of parents. This could be backed up with quotes, anecdotes etc. from other parent users of blogs in other places. Do the findings match? I would need to rely here on other people sending me information about parents in other places, so I’m not sure if this bit will work or not - I guess time will tell.