Technically, it was a conspiracy, but not by the government, Jews, Freemasons, or anything like that. I suggest that you emphasise in your presentation that the terrorists "conspired" to hijack four planes and crash them into buildings. If your teacher gives you a poor grade for believing in established historical fact, you should take it up with your principal, and if necessary, with your school board.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.