Consider in each article:

How does the author establish and maintain credibility? Does the author need to? Or is the author automatically assumed to be credible? Does the author use logic? What about emotion? Do you see any fallacies? Discuss. Does the author bring in personal information of any kind? What is the tone of the document like?

For each article identify the most common patterns: consider the type of content (is it academic? Is base information provided or is it assumed you already know it?), language used (formal? Informal?), pronoun use (I? You? We?), active or passive language, structure, design, format, syntax, diction, citations, and visual style/use of graphics. In other words, what do the writers in this discourse community do to reach others? Why do you think this matters? Links to an external site.