Essay Assignment for Critical Thinking Text

I'd like to incorporate From Critical Thinking to Argument into the first unit of the semester. For the first 4 weeks, I could teach the book while having the students find an article that they disagree with. Their task is to write a 1,000-refutation of the article while exposing its fallacies and other writing lapses. They could use Toulmin or Rogerian method. They would need at least 3 sources for MLA paper.