To be clear, the advice I gave the children wasn't to ignore it or that they weren't allowed to talk about it - I said they could say they were sorry to hear about it and ask how she was etc. We made the cards, and the family, including 'Katy', knew that we had told the year group and teachers.
It was just that I didn't want her being overwhelmed with children offering to do things for her all the time, or asking potentially inappropriate questions. But I'm aware, because we had the exact situation in my class when I was in Y6, that for children it can be upsetting but also exciting and interesting. The girl it happend to in my school was adopted, and someone asked her if she could just get a new mum like she did before!
In my case we didn't actually know how Katy's father died, but again I did not want the children, some of whom had very limited social skills, to be doing things like asking Katy "did he jump off a roof?" which is what one of them asked me!
I was prepared for children to be upset and worried about their own parents, but I don't think knowing the cause of death (I think we found out later it was a heart attack) would help with that, as it was a sudden death and unpredicted. It could just as easily happen to their parents tomorrow, which wouldn't be very reassuring!
Again, we weren't trying to pretend things were normal, but I don't think having lots of people who weren't even her friends suddenly trying to interact with her would have helped.
I agree that if my policy had been to ban all talking about it or reacting to it, that would have been a bad idea.