What makes feedback effective for students?
Effective feedback is specific, about the process not the person, and requires an action. "Your evidence in paragraph 2 doesn't connect to your claim — add a sentence linking them" beats a grade or "nice work."
Feedback is one of the highest-leverage things a teacher does — Hattie's syntheses rank it among the largest effects in education (with the honest caveat that the effect size varies enormously by type). The type is the whole game. Three principles separate feedback that moves learning from feedback that doesn't:
- Process, not person. "Your reasoning broke when you applied the rule to a case it doesn't cover" teaches; "you're so smart" or "try harder" doesn't. Praise aimed at the person can even backfire — aim at the work.
- Specific and actionable. Vague feedback ("be clearer," "more detail") gives nothing to act on. Point to the exact place and the exact move: "In paragraph 2, your evidence doesn't connect to your claim — add one sentence linking them."
- It requires a response. Feedback the student reads and files away is wasted; the best feedback creates a next action — a revision, a re-attempt, a correction. Correcting a mistake a student was confident about (the hypercorrection effect) produces unusually durable learning.
The bottleneck isn't knowing this — it's writing specific, process-focused feedback for a full stack of papers without burning out. A specific first comment per piece of work, that you adjust, is how the principle survives a real grading pile.
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