[JustPassingBy]

Slacking off from your studies just because you don't have an adult standing over you is pretty immature and childish. I think you need a punishment that will remind you of that.

First you're going to buy yourself some goodnights or other similar diapers for bedwetters. You will wear these every night until you are fully caught up with your revision and other responsibilities.
The bathroom is off limits from 10 pm until whatever time you normally get up. If you need to pee during the night, you can either hold it or use your diaper like a little girl.

If you don't study for an entire day, then you must also wear your diapers for the whole of the next day. You can use the toilet as normal during the day, but bring a change in your bag just in case.

Additionally, for each question you get wrong or point you lose in any assignments or tests you will spend one minute standing in the corner thinking about how you can do better.
If you know you've got a particularly bad score on any work then you should also post your score here and ask for further punishment.