Introduction: (Section 1)

Description of the article, name of article, author etc.
Thesis Statement (main idea of your critique, sums up the main points of the critique
Explanation of why you think the article is relevant

Summary: (Section 2)

Outline main points
Outline results
Outline discussion

Analysis: (Section 3)

Description of problems with the authors premise, methods, or conclusions
A well-organized argument flows well from one point to the next
Clearly addressed and refers back to the thesis statement of critique

Conclusion: (Section 4)

Overview of the articles argument
State conclusions based on analysis/critique
Provide your reactions to the article (what you liked and disliked about the article)