I don't think face-to-face instruction should focus on practise and exploration any more than it should on learning basic facts. Practise is controlled repetition, and this is probably the easiest thing for a learner to undertake on their own. Exploration is likewise a very personal endeavour - it's always come down to exploring how the concepts are relevant to me, or a specific context I am interested in.

Face-to-face time ('instruction' is not really the right word for it) should focus on collaboration more than anything.