A new study from the University of Stockholm and the University of Hong Kong reveals a concerning link between using Artificial Intelligence to complete assignments and a decline in student grades. Researchers found that while AI can improve the quality of submitted work, it negatively impacts performance on exams. The 30-month analysis suggests students relying on AI for homework experience a roughly 20% reduction in their exam scores. This indicates that AI assistance hinders long-term learning and understanding of course material. The study highlights a trade-off: improved assignment results are offset by diminished ability to apply knowledge independently during assessments. These findings raise questions about the ethical implications and educational impact of widely available AI tools.