There is no denying it: A.I. has changed higher education, and teachers are trying to catch up — to figure out how to live in this new world, and how to make learning meaningful.Stephen Aguilar studies how emerging technologies shape teaching, learning, and motivation. He’s also co-leading work at the USC center for generative A.I. and society, which just released a new report examining how students and teachers are actually using artificial intelligence in real classrooms.