Principlev1
Preparing to teach material produces deeper learning than
Preparing to teach material produces deeper learning than preparing to be tested on it, because teaching expectation activates organizational and metacognitive strategies that self-study does not.
Why This Is a Principle
Derives from axioms about metacognition (Two-Level Metacognitive Architecture), the gap between felt and actual understanding (Illusion of Explanatory Depth), and encoding depth (Encoding Depth Determines Retention). This is the 'protégé effect' generalized into a principle: if you want to learn something deeply, prepare to teach it. Actionable, derived, general.