This was the very first sketch of the application. Meanwhile, several iterations were done and the possibilities increased.
The front side shows the core content. 5 slides or a short video.
Video experience may include overlays with text and buttons.
The back side helps learners go beyond the initial content. The idea is that learners will check the back side later and several times to stretch further their understanding.
The back side is made of widgets. There is an initial offering of widgets but more can be built. Each widget type provides a way for learners to deepen their understanding.