The Sorting Hat!!!
Which house do you belong in? If you do not know, the sorting hat will. Try it on, and answer to the best of your ability. Don't cheat, just answer truthfully. When your done, be sure to let your headmistress know where you belong.
Do you know which house you belong in?? The sorting hat does... try it on and see for yourself. Don't think of cheating though, answer truthfully and to the best of your ability.