as course material
This is not eco-friendly 
Well, learning is usually not so eco-friendly actually…
It needs resources to be wasted so that the learner be able to practice and make mistakes !
In this respect, teaching machine-learning is not eco-friendly at all…
Not providing learners with some additional material that would let them master theoretical concepts to their liking, because it might imply some printing sometimes, seems pretty weird…
Is it possible to download PDF for offline viewing and reference, though?