Skiving

I would do whats said above and if you mom is the type that always goes to feel your forehead then rub your forhead with your hand till it gets warm. Plan ahead too so the night before you want to say home say you don’t feel well. If your planning on a stomach problem effect then ~Only eat bits and pieces of dinner; when your parent(s) ask what’s wrong, tell them that your stomach hurts. Make sure you have snacks hidden in your room so you can miss a meal because you’re “not feeling well.” If you normally do your homework, get started on it, but put your head down periodically so that they see you’re not feeling well and it’s interfering with your work

If you want a Cold/flu effect.~ Breathe only through your mouth, as if your nose is stuffed. Wear many layers of clothing. This makes it look as though you are freezing, since sick people feel cold easily. Sneeze loudly, then sniffle in front of your parents. Do this also when they’re not in the same room but can overhear you from wherever they are

Good luck!