Story telling and testimonies are probing to reach better attention and retention.
New teaching tools have to use successful cases as the way to explain theoretical content.
A good story telling is better than any tool for fixing concepts. And story-telling is better if told by the own protagonist.
Theoretical contents and testimonies goes hand by hand to explain the users how to implement the new knowledge they are acquiring.
Teaching methods are to be based on real experiences, on testimonies of other successful cases. Learners want to be tought from people which suffered their same path, based on real experiences, not just from a theoretical point of view.