Assess students' ability to identify and analyze cohesion devices—reference, substitution, ellipsis, and conjunction—in undergraduate academic essays. Tasks include labeling instances in short essay excerpts, explaining how each device contributes to local and global coherence, diagnosing ambiguous or inappropriate uses, and proposing concise revisions to improve clarity and flow. Scope: 150–300 word disciplinary excerpts; emphasis on analytical justification for editing choices and awareness of rhetorical effect.