Use what you couldn’t teach as your study list

The moments you fumbled while teaching are exactly what to go back and learn.

Why it works

Teaching is a high-fidelity diagnostic: the points where you stalled, hand-waved, or could not answer a question are precise, located gaps, not a vague sense of weakness. Restudying those exact spots and then re-teaching closes the loop, turning the protege effect from a one-time boost into an iterative cycle of finding and filling gaps.

How to do it

1. After teaching, write down every place you struggled or could not answer.
2. Restudy only those specific gaps rather than rereading everything.
3. Teach the topic again and check that the previous gaps are gone.

Evidence

Combining teaching with targeted restudy draws on well-supported principles — self-explanation reveals gaps, and focused retrieval and restudy of weak points improves retention more than undifferentiated rereading. (rct)

The component effects (gap detection via explanation, targeted retrieval practice) are well evidenced; the specific teach-restudy-reteach loop is a sound assembly of them rather than one studied protocol.

Common mistake

Teaching once, feeling the boost, and stopping — never going back to the exact spots you fumbled, which leaves the real gaps intact under a layer of confidence.