I don't understand how a teacher can be held responsible for all her students until they have reached their homes.

We lived within walking distance of our elementary schools (one for K-3 and another for 4-6). Not only did we walk to school, but we also walked home every day for lunch! I used to watch soap operas with my mother and grandmother during lunch every day.

For 7-12 we had to take a bus because the school was several miles away in the next town. But we were on our own getting to and from the bus stop every day.