Currency: When was the article published?
Relevance: Is the article peer-reviewed? Does it cover your topic? Have you looked at a variety of articles before determining which ones to use?
Authority: Is the author qualified to write on the subject?
Accuracy: Where does the information come from? Does the language and tone seem biased?
Purpose: Is the information intended for education, entertainment, or persuasion?
Here are examples using the evaluation criteria illustrating how to evaluate articles.