I have seen a similar demarcation line between "children" and "young people" in some research carried out in England, where it was explained that it was because 10 is the age of criminal responsibility, so only the under-10's were recorded as "children".
So the upper age limit of "childhood" depends on context - and in some contexts they are referred to as "young children" and "older children". The boundary needs to be defined and explained though.
With schools, the ones that sound fine to me are:
- pupils
- scholars (seems to be a regional variation, at least I have only seen it in the North East)
I find "students" confusing as I associate it with education out of school or post-school. 6th Form College = "students" though for me because of the word "college", so "students" doesn't jar in that context.
A variation that I think is definitely iffy is "little people".
I heard a Social Worker talking about "little people" and I genuinely thought she was talking about people of restricted growth and had difficulty making sense of what she was saying.
When I realised she was talking about children I told her that I had been confused and she explained that as Social Workers they saw children as people in their own right - just "small". I found it really odd and it stuck with me in the back of my mind for years.
When all the "Grooming Gang" scandals started coming out ("Child Rape Gangs" would be a better term to my mind) there was talk of how Social Workers had regarded children who were prostituted as having made "life-style choices". It made me wonder if the practice of referring to children as "little people" played into that? Whether Social Workers had been conditioned into seeing children as small adults who were making informed decisions, rather than as vulnerable children being sexually abused and exploited.
Even so, they must surely have known that legally the children could not consent to sex? The attitudes of the Social Workers baffles me even more than the attitudes of the police because their job is meant to be child protection.
Going back to the OP and this wording:
"I have just had an email from secondary school (with sixth form) asking 'all parents and carers of our young people from all year groups' to complete the survey."
I don't like the "our" in there. It doesn't need to be there and the school does not own the "young people".
If you take out "our" then why does "young people from all year groups" need to be in there either?
The school is writing to the "parents and carers". All it needs to say is, "all parents and carers".
So the extract would read:
"I have just had an email from secondary school (with sixth form) asking 'all parents and carers' to complete the survey."
Bingo! The school is no longer seeming to claim ownership of the "young people" and there is no need to decide how to refer to them when addressing their parents/carers.
That phrase, "our young people from all year groups" - it seems a bit cheeky on the part of the school rather than just unnecessarily wordy.
The school should have stopped before writing "our" - and if it needs to be more specific then it should stick to terminology that reflects its remit, eg. "pupils", "students", etc.