Natural Born Citizenry: Who can run for the presidency?

In the eighth grade, I fell in love with the Constitution. I argued with my civics teacher in front of the class as to what the natural-born citizen clause meant for the qualifications of the Presidency. I argued that it meant that the President had to be an American citizen born of two American citizen parents. The teacher gave me a week to come up with verifying evidence. I couldn't find any so I could not prove I was right. My whole life, I wanted to prove that I was right. I think in this book, I have finally proven that a natural-born citizen means a child of two American citizen parents.