I'm a Year 6 teacher currently teaching WW2. Every year our school has a 'VE' day party at the end of the unit where the kids come in period dress. We are doing it next week, but had completely forgotten about the dressing up part (new to year 6, been a bit too bothered about upcoming SATS recently) until one of the kids asked about me about it today. They are really excited about it as they've seen previous years do it. So would WIBU to send out a note tomorrow suggesting the children dress up next week, considering its really short notice, most of the kids families are on tight budgets, and many parents don't speak good English so the whole concept will probably be lost on them anyway?
Personally I really don't care either way, I'm more concerned about the pissed off child vs pissed off parent issue!