When you normally get up, stay in bed. When your mother, father or who ever looks after you comes in to wake you up moan and complain you're sick. If they believe you then lucky you but if they don't then just keep moaning (not sexaully) and complaining you are sick, then when you think the time is right ask your care giver if they have any tablets. When they give you a tablet place the tablet beneath your tounge and drink the water down quickly trying not to get the tablet very when. When your care giver is not looking take the tablet out a put it in the bin or just somewhere they won't see it. normally when this happens they fall for it. You're welcome & good luck on failing school <33