Consider the popular 70:20:10 “formula” stating that 70% of learning happens on the job, 20% through coaching and mentoring, and 10% takes place in classrooms.
While little empirical evidence supports it—the scholar to whom the formula is often attributed recently described it as “folklore”—plenty of organizations invoke it as a cornerstone of their learning strategies.
The reason we have turned folklore into a formula, I believe, is because it resonates with the safest, most efficient kind of learning—the incremental kind. We acquire an idea and we practice it with some feedback on the way. That eventually results in mastery. That kind of learning is additive—and addictive.
Transformational learning rarely builds up so smoothly. It does not just make us more knowledgeable. It reveals what mastery prevents us from knowing. It does not just refine our skills. It changes our perspective. And it is not just a matter of time.