At a moment when artificial intelligence promises to dissolve the friction of learning, a quieter and more demanding question surfaces in classrooms: what does it mean to teach deliberately without it? The concern is not merely technological but philosophical — students have already internalized the logic of efficiency, and simply ignoring AI will not restore the value of struggle. What is being called for is not a return to older methods, but a reinvention of teaching as a human practice centered on discovery, effort, and the irreplaceable experience of earning understanding.