When a learner makes a minor, non-safety-critical error during a manoeuvre, what is generally the best instructional approach?

1. Interrupt immediately, mid-manoeuvre, to correct every small error
2. Ignore minor errors permanently so as not to discourage the learner
3. Take over the controls completely for the remainder of the lesson
4. Allow the manoeuvre to be completed, then address the error calmly during feedback