There is a cheap graphing calculator, "Graphing Calculator" for only $1.99 which is intuitive and has a function plotter with high resolution. It also has a scientific calulator. For $19.99, you can buy "Space Time" which has a graphing calculator and has over 200 different math functions.
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.