Drop off and Pick up times

I ´ve done my little experiment in two differents schools and high schools. Public Primary Schools and High schools and Private Primary Schools and private High Schools next to my house and very close between themselves.
Although they are very close, their values are very different and their students are very different too. As you can imagine the student´s parents are also different, of course.
For example: Early in the morning, private school students come to school by car with their parents, while public schools students come to school walking and without their parents. (Children over 12 years old)
I think it could be for two main reasons:
- Parents who carry on their children to school early in the morning don´t work because they don´t need it.
- Parents who carry on their children to school have jobs where they can arrive later.
I don´t really know very well, it is only a personal idea. Perhaps it could be a new aim for a future research.

Out of public school, normally there is a crowd of children and teens speaking among themselves, and playing before the bell rings. In contrast, private schools students are usually in the playground waiting for the sound of the bell.
I imagine the timetables should be similar between themselves, but I think that the serious difference of values between the two kind of schools are in the method of education and in the family values.

At Pick up time, something similar often happens but in differents times, because the school hour is also different.
In private schools´s door there are a lot of cars, and many of them, are usually large cars. I don´t know why this kind of cars has become fashionable cars. But it is real. At least where I live.

The conversations between parents are similars in both kind of schools, but it depends on their social class. The social class are usually different, but not always.

Children under 12 years old, normally go with their parents in both cases, public and private school, and the conversation between parents and sons or daughters are usaully very similar.
-What about your classes? What have you done today? What about your marks? Are you hungry?
-Oh, you have broken your trousers playing football again, haven´t you?... whatever...have you won??

But teens are different. They begin to have a role, in their high schools and in their homes, and they ask for freedom. Normally this 'freedom' is not given in upper middle class earlier than in working class.
Perhaps beacuse upper middle class parents want to have their children protected for a long time. But it isn´t natural.