Feedback, interaction analysis and teacher evaluation

Feedback is information about performance that the learner can use to improve — and its quality decides whether it helps or harms. 'Good' tells a pupil nothing; 'your introduction states the problem clearly, but your evidence does not support the second claim — add one example' tells them exactly what to do next. Worked example: a teacher who returns work with specific comments and time to revise is using feedback as learning; one who only writes marks is merely judging.