hmm, not sure I agree with all of these.
ds goes to super selective grammar, is very happy, and is due to do well, as its a good school. They are fairly relaxed about phones, out of sight during lessons.
Dd goes to the girls school next door, zero phones during school hours.
I am meh. There is no real difference.
Atmosphere is good, but remember your children are only year 6 now, this school has to work for them aged 15, 16, etc, so think about what the older kids look like as you go round. Are the classrooms placing where there is a good working atmosphere? What is on the walls. What is your dc interested in - if art ask about art, if maths ask about maths.
What are their weaknesses? How do they support kids struggling with that? How do they stretch the brighter ones?
Patsoral care - how does it work?
Bullying policy? - beware any school which says it doesn't have any bullying.
clubs - this says a lot about teachers enthusiasm too as clubs are usually run by teachers.
Subjects at GCSE - 3 sciences? modern languages?
Do you know anyone, even vaguely who has a child there? One school we would have put as no.2, we met a family who were desperately trying to move their year 9 son away from it. He was similar to ds, and we decided not to put that school down. Over the next few months we we very glad me made that decision. But same school then had a new head and has pulled back up, so make sure it is current data