How to Encourage Brain Development in Teenagers

As a parent of two teenagers, what does this mean for me as a parent? Do I let them sleep until 2 p.m.? What do I do here to encourage brain development? My mom used to wake me up at like seven o'clock at the vacuum cleaner. And really it's not a problem with the teenager. The teenager can sleep fine and should sleep. We need they need that sleep for that brain development. It's a problem with parents that we don't like it when our teenagers sleep in so late.