Any debate about gender identity would have to be really carefully framed I think (although I'm not suggesting it's a bad idea) because there are layers to it: a) we all have a gender identity versus we don't (where the "we don't" is based on the "counter belief" that sex is immutable) and b) should gender identity (belief) be accommodated in education? If so, as truth or belief?
Obviously b is a moot point because this is already decided. According to the current DfE guidance, it should be and it is considered to be a fact.
A debate about whether or not the earth is flat is a great idea but there's a clear understanding that everyone really believes it's not. So the second layer about accomodating it in education would never kick in.
A good (if perhaps uncomfortable) analogy to gender identity debate would be a debate about the paternity of Jesus. To give it the two layers: a) Jesus is the son of God versus he's not (where the "he's not" is based on the "counter belief" that a conception without sperm is impossible) and b) should a belief that Jesus is the son of God be accommodated in education? If so, as truth or belief.
Again, obviously b is a moot point because this is already decided. According to the current DfE guidance, it should be and it is considered to be a belief.
I think most people (including Christians) would find it implausible that anyone would want biology lessons which accommodate the idea that most conception involves sperm but it is possible for a conception to be different.
Unfortunately that's what is being achieved by teaching and accommodating gender identity belief as a fact. Children are being taught to reject the biology that underpins the difference between two sexes, in favour of a man being someone who identifies as a man and a woman is someone who identifes as a woman, where their actual sex is irrelevant.