In 2025, researchers at Harvard published a result that should change how we think about AI in education. In a randomized crossover trial with 194 introductory physics students, Greg Kestin and his colleagues compared a custom-built AI tutor against one of the strongest alternatives available: an active-learning classroom led by experienced instructors. The students who learned with the AI tutor learned more than twice as much — and they did it in less time, reporting greater engagement and motivation along the way.
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