Is the kind that forces you to interact with the real world.
For me, college operated inside of a bubble. The campus wasn't the real world. Neither was the work we did inside of class. It was safe. But I've done other kinds of eduction that weren't so safe:
At SRI Coaching's Masterneurostrategies course, they dropped us off in downtown Las Vegas and asked us to find our way back to the hotel without any money (just our skills of persuasion).
At Landmark Education, the homework assigment during our break times was to call people we were having real problems with, and resolve them. On the spot.
At Seth's Alternative MBA, we built real businesses. We made real sales calls, resulting in real money changing hands.
So often education is about learning how to do things in the real world, instead of actually doing them. But it's overcoming the fear to act that people so often need help with.