dd is 12. Since she was 11:
To get to her secondary school, she has to go on bike (summer) bus/car (winter) to the station (10 minutes)
Then 30 minutes on a train, then 10 minutes walk.
If she wants to, she can pop into town (near the station) after school
On a saturday she can bike/bus into town and meet friends.
yes, she must tell me where she is, and when she expects to be home.
If going to a friends, I do exchange a text with the parents, but that is becuase it is often in the town where her school is, so further away. For a friend on our town, I would trust her to say - I will be with xxx this pm.
family days out are tricky - ds is 15, and until this year we have encouraged them all to be part of the family.
Now, with ds, I would give him the option, unless it is visiting grandparents. And I let dd (aged 12) go to scout event rather than family birthday a few months ago.