Study: Chinese students' homework scores rise but exam scores fall after using generative AI

A study tracking about 27,000 students aged 12-18 in China for 30 months found that after adopting generative AI, homework scores rose by 18% while time per assignment fell from 64 to 45 minutes. However, in monthly closed-book exams without AI, scores dropped by 20% within six months, and high-stakes entrance exam performance also declined. The research was conducted by scholars from Stockholm University and the University of Hong Kong.

The study directly relates to the design and use of AI education products, suggesting that without pedagogical structure, AI may cause 'metacognitive laziness' and harm long-term student abilities. Impacts include: parents and teachers may reconsider the role of AI tools in homework; education product developers should focus on features that promote independent learning rather than just providing answers. Parents and teachers may adjust supervision of AI homework assistance, emphasizing assessments in AI-free environments. AI education products need to shift towards designs that support metacognition and independent learning.