To answer your original question, speaking as someone who has had two boys go all the way through Bootham from Junior to Senior...
- Is Bootham a good choice from academics perspective?
Both my boys, who were not academically brilliant by any means, did very well at the school, made many friends, increased their confidence (especially the younger one), and generally loved their time there. The school itself I would heartily recommend. The Quaker ethos really shines through when you visit the school. Students care for each other, care about the world in which they live and are just really nice people to be about, not self opinionated or arrogant.
Is it a smooth transition between the Primary and Secondary? Is there any chance of him not getting in the Bootham Secondary from Bootham primary?
Although the two sites are not next to each other, the Junior site is a wonderful environment, and of course they can share the same facilities as the older kids use, so they get used to going to the Senior school as they get older, and are often taught by the same teachers. By the time they come to change, they are already well adapted to the bigger school and so it all tends to happen naturally.
They don't have to sit entrance exams (I don't think) as their teachers already know their capabilities, so I don't think that acceptance is an issue.
I can only speak from personal experience, but I would tell anyone what a wonderful, caring school it really is, and my two boys would probably tell you of the lasting friendships they've made.