Features

Each lesson will contain multiple short videos.

Each video should build on the last to increase intrinsic load.

Each video should end with a question. Obodo and Baskauf (2015)

Videos should not contain complex music.

Teachers should talk quickly.

Teachers should refure to old information.

Videos should have a written alternative.

Duolingo case study

Notifications (push u into using the app)

Duolingo Rankings (only top 7 people move up (out of 30), religations can happen)

Streaks

Dont make the answers obvious (even if re-doing a lesson)

Duolingo px goes down per failed question

Would be nice to have a revise mode that fires random questions (from completed topics), if you get it wrong the clip with the answer is played.
Might be good for seeing what you are bad at.

Quick

The ‘push notification’ technology was also deemed useful when tasked
with encouraging immediate learning and helping learners stay up-to-date
with content (Garbrick & Clariana, 2015; Kudo et al., 2015).

Applying game principles in mobile app design