Generalization remains a central challenge in machine learning. In this work, we propose Learning from Teaching (LoT), a novel regularization technique for deep neural networks to enhance generalization. Inspired by the human ability to capture concise and abstract patterns, we hypothesize that generalizable correlations are expected to be easier to teach. LoT operationalizes this concept to improve the generalization of the main model with auxiliary student learners. The student learners are trained by the main model and improve the main model to capture more generalizable and teachable correlations by providing feedback. Our experimental results across several domains, including Computer Vision, Natural Language Processing, and Reinforcement Learning, demonstrate that the introduction of LoT brings significant benefits compared to merely training models on the original training data. It suggests the effectiveness of LoT in identifying generalizable information without falling into the swamp of complex patterns in data, making LoT a valuable addition to the current machine learning frameworks.

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