Sorry I didn't come back earlier. She has ASD, although it took until she was 9 (and 3 schools plus home ed in between schools 2 & 3) for anyone to take me seriously. She was diagnosed at 11.
She got 110 in her English SATs because they realised she'd fail so they taught her to test. They realised she couldn't infer information from text, so they taught her key words to scan the text for, with the associated inference.
Now, at secondary school, every time I have said she's struggling, they've said she's ok. But she can't read a piece of text and pick out what is relevant information. She can't infer from the text.
I was reading an extract with her and I said "the lady is excited about her skiing trip..." and DD2 replied "Well she shouldn't be because she's going to die in a minute". I tried to explain that the examiner would expect her to just approach it as a reader. She said "I am a reader - I've read it, she dies in an avalanche!" So I tried to explain that she needs to ignore that and just look at the bit at the beginning but she pointed out that she knows how it ends and she can't unknow it.
Somehow, she is going to have to learn that it doesn't matter what she knows and what she thinks - if a question is focused on one part of a text, she needs to isolate it. Or at least, if it's asking her to analyse the language, she can't say 'Well it's stupid that she's excited because she's about to die..."
At parents evening the teacher said she was doing ok. Now we've had her report with a working at level 1. She can generally talk quite intelligently but can't get it down on paper.
I have managed to get them to let her use a laptop and have a small room and rest breaks for exams but that's only been put in to play in the last few weeks.