I believe most honor codes have the prevention of cheating and plagiarism as their prime function -- which is why this is the perfect example of irony for your

I believe most honor codes have the prevention of cheating and plagiarism as their prime function -- which is why this is the perfect example of irony for your high school freshmen. That said, you're addressing broader issues of intellectual property which certainly merit discussion. Giving credit, to me, is essential when basing work on a previous source.