Tests are usually at the end of the summer holidays, I’m not sure how they’d even take a child out of school for that?
For me, it’s largely about attitude to hard work and preparation. My children are at grammar school now and the cohort is wonderfully diverse.
At primary, there was a girl in my DD’s class who was absolutely adored by staff, constantly praised as exceptionally academic, musical and simply amazing. She was class rep for years, house captain, always given the lead roles in school plays with solo singing parts. A lovely girl, but the preferential treatment was obvious. My DD, by contrast, was very much in the background and rarely singled out or encouraged to shine, which was frustrating to her at the time.
That girl was always top in maths and English and even got sports opportunities despite not being particularly sporty. When it came to the 11+, though, my DD passed with flying colours, while the other girl got an average result and didn’t get into the highly sought after grammar. Her mum was stunned, having been led to believe her daughter was a genius.
The difference wasn’t ability, my DD isn’t more naturally talented or academic. She’s just kept working steadily, and we approached preparation strategically. In the end, it really was about consistent effort and focused prep.
IME, generalising here but there is tendency with white British middle class parents to value inherent cleverness and 'making memories' over hard work and knuckling down. It is a cultural thing. I have no doubt whatsoever though that this other girls will be getting top GCSEs grades despite not getting into the grammar school. At the end of the day, it really is about parental interest in education and children can still do absolutely well in a bog standard comprehensive school if they apply themselves.