DD 16 won't ever go to sleep at a reasonable time. Even when she goes to bed at a sensible time she'll text till 11.30 at the earliest and often till 1am.
She's doing scottish highers this year and in danger of not getting the grades she needs for the courses of her choice. She studies a bit, but not very much, presumably not helped by the late nights and endless texting.
She just gets to school on time, but would sleep for the whole weekend if she wasn't doing other things. She won't wind down with a bath or a good book either.
I'm very lucky with her - we have few arguments now that I'm getting the hang of biting my tongue and not sweating the small stuff - but she won't be told what to do. Not that it's often required as she's luckily not into drinking/wild parties/offensive clothes/'unsuitable' friends etc and I know I'm lucky as she's a kind, nice girl with lovely friends.
However she really hates not getting to make her own choices although I'm not strict with her - eg, she had a lot of freedom with her, now ex boyfriend. I've told her she'd do better if she got to sleep earlier but to no effect.
I think she'd feel deeply aggrieved if I imposed sanctions on her for late-night texting- which I know about through the itemised bill - which she hates and it does feel like snooping, though I don't know who she's texting. BUT she'll regret it if she doesn't get into the uni courses she wants - highly specialised and vocational and not really academic even though done through university-accredited institutions. She's bright but not interested in much academic so she has no plan B. I think she'd find something else to do by way of exercising her right to make her own choices if she was prevented from her late night texting but maybe she WOULD be glad if she didn't have the opportunity to text till midnight.
Your advice would be greatly appreciated.