My younger three are 11, 9 and 6 so we still follow a routine.
Usually, wash and pyjamas (they shower each morning!)
Downstairs for drinks and saying goodnight, and thenwe read some bible stories or even bedtime stories pray and say goodnight.
Always try to have them in bed by 8.30 sometimes it goes on a bit.
At weekends they stay up an hour later, but mine get really irritable if they dont get enough sleep!