Syag- Sorry! I did not think through that post. Did not mean to imply you nagged or insult your parenting, from all of your posts, I am sure you are a wonderful mother!
I mean natural consequences, like getting detention. If they are not late than what is the problem with needing to wake them up?
Edit: I get that they want to wake up, but they don’t in the morning. If they really wanted to wake up, then they would go to sleep earlier.