The GP does not propose that teenagers wake up any earlier in the sense of solar time, just that we don't change the clocks. Right now they wake up an hour ear

The GP does not propose that teenagers wake up any earlier in the sense of solar time, just that we don't change the clocks. Right now they wake up an hour earlier than they did the previous day, the only difference is that their clock shows the same hour as it did the previous day. Instead, they should just wake up an hour earlier and have the clock show that they woke up an hour earlier. There's no actual difference in the amount of sleep or daylight that the teenagers get, just a vastly simplified system for figuring out what they wall clock should say.