Knowledge @ Wharton for High School

I have always enjoyed the Wharton series of papers and videos. I just noticed that they had a series of posts especially designed for High School Students.  Here is an example.  An interesting idea, but no one but advanced HS students would be interested in these,  and they should be stretching themselves to adult articles.  This economics article is about coming US Social Security shortfalls. Not technical, very generally readable.