Usually that refers to a "Foreign Exchange Student" which is a student participating in a program which puts them with a foreign family so they can attend school in another nation. The other country also puts some of their students here for study, hence they are exchanging students. It is very beneficial since you can achieve unparalleled knowledge of a foreign country and their language and culture, so it can be very competitive and difficult to be selected, but you never know until you try.
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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.