What are the 5 most powerful didactical principles?

I’m looking for your input, what are the five most important didactical principles to apply when creating e-Learning? The reason I’m asking is that we are doing a project to support our users (most of them do not have an e-Learning background) in creating more effective and didactical sound content. I will explain in this post.

Easygenerator is an e-Learning authoring tool for people with no e-Learning background. We know that our tool must be so intuitive that anyone can log in and without any training can start creating courses, assessments, e-books and curated documents. But that is not sufficient. We also know that an expert without a didactical background will very often not create the most effective e-Learning. They will go in with a Powerpoint mindset and create very content heavy courses without a proper didactical framework.