An AI marking case study: from four hours to twenty minutes

Summary

A classroom case exposes teacher reading, student trust and ambiguous AI feedback.

A Year 9 teacher made 26 comparisons and dictated comments on 26 scripts, combining them with AI judging. Logged judging and comments took under 20 minutes; pupils valued knowing their teacher endorsed feedback.

The four-hour comparison is the author’s estimate, not a measured control. Familiarity with pupils and drafts matters, and the timing does not capture the entire instructional workflow.

A vendor reports one teacher’s class experience, without independent learning tests or complete time comparisons.