There’s no shortage of theories as to why a scenario works so well as an educational device. But for me, it boils down to context.
An authentic and relevant context facilitates two important processes.
1. Sense making
The authenticity and relevance of the scenario contextualises the content so that it becomes more meaningful for the learner. It approximates a real life situation with which she is familiar so that she can make better sense of it.
When the learner finds herself in a similar situation in real life, she will associate the current context with the scenario and thus apply her experience from it more readily.
When we combine these two affordances with the engagement power of video, we create a triple threat which dramatically increases our probability of success.