An education story that's bad for students who leaned on AI, and a sign of how schools are fighting back against cheating.

• A Brown University professor moved the final exam from take-home to in-person and watched scores collapse.
• Some students who aced the take-home midterm scored below 20% on the in-person final.
• Others who got grades in the high 90s at home dropped to the 50s once they had to sit in a classroom.
• Many top-scoring students simply dropped the course rather than take a supervised test.

Outlook: Expect more colleges to bring exams back in-person as AI tools make take-home work easy to fake.