0, we sent them to the nearest primary, no transport and walking in the winter makes you pick by distance I find.
For secondary, they just went to the only one in the town.
For DD2, she had additional needs so we were guided by the therapists as to where they thought she should go. That meant taxi's for Nursery and Primary, school bus for secondary. I felt much more involved with the closer schools, because I could speak to the teachers as needed, more difficult when you are relying on the home/school diary.