@serge my wife also teaches the most hands on courses imaginable, lab courses, which she invented from scratch and receives almost no recognition from research faculty for, a heroic activity as you well know @inthehands ! The plan facts are that even when that is your goal it's absurdly hard to do, that there are many reasons that in some situations the choice has been "NO class AT ALL" or "a lecture class," rather than a choice between a lecture and hands on personalized learning.