Further to my last post, let me share aother learning from our Master Facilitator. In short, the point is that if the learners go through the content at least 6 times in the first 24 hours, the memory retention will improve significantly. As I search on the Internet, I find a relating concept called 'Ebinghaus Curve of Forgetting'. See the figures on the left which is self-explanatory.
I guess the most obvious implication is that lecturing is definitely not very favorable to memory retention!
Another implication is how to make the learners visit the content 6 times without being bored. The best method I came across is Windowpaning which I learnt from Bob Pike.
Let me share later.