I like this idea, and I think the research has backed it for decades - I wrote a letter to my Senator, Hillary Clinton, in support of later school starts back in middle school that cited such work. I think it hasn't happened for two reasons:
1. School is childcare for a lot of people; secondary schools let out early so older siblings can take care of younger ones.
2. As COVID has shown - it's difficult to manage multiple hybrid schedules and cohorts in an equitable way, especially if you're not expanding the number of teachers (which most districts can't due to budget constraints)
This is a little US-centric, but I suspect it applies broadly to the rest of the West at least.
1. School is childcare for a lot of people; secondary schools let out early so older siblings can take care of younger ones.
2. As COVID has shown - it's difficult to manage multiple hybrid schedules and cohorts in an equitable way, especially if you're not expanding the number of teachers (which most districts can't due to budget constraints)
This is a little US-centric, but I suspect it applies broadly to the rest of the West at least.
Source: Parents worked in primary/secondary ed.