Curiosity was the driver of learning in early society. Later, the rigid school system was created not because it was better, but because of a resource constraint: we didn't have enough teachers. School was not designed to optimize learning; it was created to manage human logistics.
(try it out: its free)
unfold creates animated courses on any topic and you can interact with it. it asks you questions to understand you, what you want to learn and how you learn best.