Transgender, as with all LGBT, is part of the RE Curriculum. It has been for a number of years, and it features in PSE as well. As does sex education.
You are behaving as if we sit down and tell them all to be transgender.
No, they would not think they can change sex, because nobody actually is telling them that, despite MN's insistence that they are.
As for your statement about self declared identities, yes they are affirmed by schools (which I 100 percent agree with), but I've yet to see it happen without parents knowledge. And no, its not encouraging "confusion", and its really patronising of you to continue to refer to it as that simply because you dont agree with it.
I said only 10 percent of people physically transition.
So unless these mythical children are all undertakng medical transition and then de-transitioning, I'm nt sure how that happens (other than the fact us demon schools are all forcing it upon them, of course).
I would honestly suggest that the answer to this, and similar scenarios, is talk to the child. Talk to the school. Don't put words in peoples' mouths and start talking about the myth of changing sex, as I've never actually heard that said. Hopefully you may meet some trans teenagers, as I do and have, and you might see why I'm being so what you believe to be obtuse.