Learning by Teaching, with Application to Neural Architecture Search

• URL: http://arxiv.org/abs/2103.07009v1
• Date: Thu, 11 Mar 2021 23:50:38 GMT
• Title: Learning by Teaching, with Application to Neural Architecture Search
• Authors: Parth Sheth, Yueyu Jiang, Pengtao Xie
• Abstract summary: We propose a novel ML framework referred to as learning by teaching (LBT) In LBT, a teacher model improves itself by teaching a student model to learn well. Based on how the student performs on a validation dataset, the teacher re-learns its model and re-teaches the student until the student achieves great validation performance.
• Score: 10.426533624387305
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In human learning, an effective skill in improving learning outcomes is learning by teaching: a learner deepens his/her understanding of a topic by teaching this topic to others. In this paper, we aim to borrow this teaching-driven learning methodology from humans and leverage it to train more performant machine learning models, by proposing a novel ML framework referred to as learning by teaching (LBT). In the LBT framework, a teacher model improves itself by teaching a student model to learn well. Specifically, the teacher creates a pseudo-labeled dataset and uses it to train a student model. Based on how the student performs on a validation dataset, the teacher re-learns its model and re-teaches the student until the student achieves great validation performance. Our framework is based on three-level optimization which contains three stages: teacher learns; teacher teaches student; teacher re-learns based on how well the student performs. A simple but efficient algorithm is developed to solve the three-level optimization problem. We apply LBT to search neural architectures on CIFAR-10, CIFAR-100, and ImageNet. The efficacy of our method is demonstrated in various experiments.

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