I wouldn't choose any of the Scholarly Articles for any of these, but some of the others should be fine. Wikipedia articles should be OK; I'm not sure about wsj.com or nytimes.com articles. You'll need to explore and determine which ones to use.
Remember to find things that are just a little bit beyond where students are now. You don't want them frustrated, but you want them to "stretch" their minds and abilities.
Jazz Age: http://www.google.com/search?hl=en&site=&source=hp&q=jazz+age&oq=Jazz+Age&aq=0&aqi=g10&aql=&gs_l=hp.1.0.0l10.1552.1552.0.64126.96.36.199.0.0.0.137.137.0j1.1.0...0.0.YAqeHkYNQAs
Paul Allen: http://www.google.com/search?hl=en&q=Paul+G+Allen%2C+co-founder+of+the+Brain+Science+Institute&oq=Paul+G+Allen%2C+co-founder+of+the+Brain+Science+Institute&aq=f&aqi=&aql=&gs_l=serp.12...11917.14133.0.185188.8.131.52.0.0.0.180.1112.0j7.7.0...0.0.AVymcVtbHZc