This will be difficult to do if you have a stay at home with your mom or dad.
1.If you are going to be sick to skip a test, tell your parent that you don't feel your best a couple days earlier. This makes it more believable that you are sick.
2.The night before your faking sick day, go to a parent a couple of hours after you go to bed and ask for medicine, but put the medicine in your pocket when your parents aren't looking.
3.When you first wake up in the morning, tell your mom or dad that you feel bad. Try coughing and sneezing a little, but don't over do it, or they will realize that you are faking it.
4.Don't speak in the "sick voice", because it sounds fake, but if you speak in too normal voice, it will also be less believable. Try to find a good balance.
5.If your parents want to feel your forehead, try rubbing on it fast to create body heat. Do not put it over a fire or stove though, that might make you feel so hot it could earn you a trip to the emergency room.
6.When getting dressed, button up your shirt but skip a couple buttons. also mess up your hair.
7.Moan a little, try and let them know you're really not feeling well, clutch your stomach or head and tell them you are dizzy.
8.If your parents give you medicine, be sure to sneak it into your pocket when they aren't looking.
9.Don't eat much breakfast.
10.Get up a little later than you should and walk around kind of slow.