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It certainly would be good, if a teacher could pre-assess a topic again, for some learners or the whole class, without the app throwing away the existing data!
Automatically swap between scaffold pair layers
e.g. layer 3 is a scaffold to layer 4. We might automatically be able to
once the learner has mastered layer 3: stop asking questions on layer 3 and begin to ask questions on layer 4, as if it has just been taught
allow the teacher to teach layer 3/4 and then the app finds out who can answer questions on layer 4 without the need for feedback and who is best on answering questions on layer 3