So, how does this online learning thing work?

Since I started to share the idea of online courses, I tend to get questions in exchange.
Questions are good, they result in answers. So, what do people ask (and what do I reply):
Human Brain Evolution

Human Brain Evolution (Photo credit: hawkexpress)

How do they get the knowledge into my brains?   Just like every other course: by clever use of media like videos, audio files, pictures / Graphics and texts. You will often find even more material for further information.

Who will take care of me learning constantly?