Chatbots Cost a Year of Learning

Large OECD/PISA data link regular use of AI chatbots for school tasks to roughly a 20‑point drop in science scores — about one year of learning. If causal, this implies that unregulated classroom and homework use of generative AI can materially reduce core academic skills and comprehension. — This could prompt rapid policy responses in schools and governments (limits on AI for homework, new digital‑literacy curricula, assessment changes) and reshape debates about classroom technology.