I'm extremely interested in this, having been a teacher and a learner for most of my life.
I started 'teaching' at thirteen when the local vicar put me in charge of the 3-5 year-olds at Sunday school. I adored doing it, and found that visual aids, plasticene-modelling and acting out Bible stories did the trick.

Later, as a qualified primary schoolteacher, I discovered that simple chalk-and-talk was boring and unproductive. Jokes, a bit of interactive banter, short educational films, related artwork, creativity, out-of-school visits and so on produced far more worthwhile learning.

As a learner, I have always found throwing myself in at the deep end taught me what I needed to know very swiftly. For example, a few years ago I learned British Sign Language,and haunted the Deaf Social Centre in Norwich, interacting with the lovely deaf folk there as best I could. I soon picked up the signing (had to!) which added a lot to my evening class lessons, and I passed the exam.
I'm now learning Malinke, and I just let my husband rabbit on, either to me or on his mobile phone to his family, and somehow, I'm picking it up well.
So I think 'doing' is the best way to learn, not breaking the subject up into digestible chunks. But every person has their own individual brain, and must learn in the way that suits them best.