This visual is to explain how learning improves when you let people engage with the information in ways where they tie both their experience and emotion to it.
Think of learning as a ladder. To reach the upper level where most learning is retained, you will need the lower levels (some elements or in some form), like climbing a ladder. No level is more important than the others. The same ladder might be just as useful for hanging up a painting as it is for fixing something on your roof. So for some goals the lower level is appropriate, while for others it would be hard to reach your goal if you don’t go beyond the first or second level.
More extensive write-up might follow later.