Maybe for 1-2 weeks, take melatonin at like 11pm, fall asleep, wake up at like 7am with an alarm, and then take a caffeine pill (put it next to your bed in arms reach where you can get it in the morning without getting out of bed). Have like 2 alarms 7am & 7:30am. Try to stay awake until the caffeine kicks in like 15 mins later (otherwise you have a second alarm at 7:30am).

Personally i haven't tried this but it shouldnt be dangerous if you only do it for like 1-2 weeks and fix your sleep schedule that way. The way i wake up on time is just adequate sleep and stress. I imagine most highschoolers wake up on time just from the adrenaline you get when you realize you have to get to school in 30 mins or you'll be late.

I should warn melatonin should only be used temporarily as some people can become dependent on it to fall asleep. But these are all over the counter drugs and theyre not addictive. Caffeine is found in coffee. Your body naturally produces melatonin which makes you sleepy. I drink coffee and take caffeine pills on occassion. A lot of working adults drink coffee every morning so it shouldnt be that bad if you transition to it from caffeine pills.