When you ask people how they want to address a learning need, they usually say they want a training course.
When you ask people how they learnt the majority of the stuff they do each day, they usually say they learnt it from experience.
If you dig a little deeper and ask when in their career did they learn the most and make the biggest strides in improving their performance, most will talk about a fantastic boss or mentor who challenged and supported them, helping them leap forward to a whole new level.
When we demand learning opportunities, we think training and education; yet when we look back at our most effective learning, we see exposure to other people, and the fickle mistress of experience, playing the major roles.
The best learning happens in real life with real problems and real people and not in classrooms
Charles Handy (cited by Jay Cross in Informal Learning: The Other 80% on Internet Time blog)
The 70:20:10 model
The 70:20:10 model is a ratio (hence the colons, rather than the more common but incorrect hyphens or slashes). The ratio is the approximate breakdown of how we learnt the stuff we do:
About 70% of what we have learnt came from experience, reflection on that experience, experimentation, failure, adapting, success, reinforcing etc.
About 20% came from exposure to other people such as our boss, mentors, coaches, colleagues, family, friends, experts we might see on YouTube or read about in a book or article.
Only about 10% came from formal education such as training courses, e-learning modules or text books.