Good mLearning courses provide only a small amount of content on each page.
Learners can horizontally scroll on a mobile device, but it may be hard for them to follow the content if they have to scroll too much.
The rule of thumb, is to provide about twice the amount of content that can be viewed on the screen.
If an average screen supports 200 characters,
Limit each page to 400 characters
This leads to courses that are short, quick, and fast.