  Multi-Teacher knowledge distillation provides students with additional
supervision from multiple pre-trained teachers with diverse information
sources. Most existing methods explore different weighting strategies to obtain
a powerful ensemble teacher, while ignoring the student with poor learning
ability may not benefit from such specialized integrated knowledge. To address
this problem, we propose Adaptive Multi-teacher Knowledge Distillation with
Meta-Learning (MMKD) to supervise student with appropriate knowledge from a
tailored ensemble teacher. With the help of a meta-weight network, the diverse
yet compatible teacher knowledge in the output layer and intermediate layers is
jointly leveraged to enhance the student performance. Extensive experiments on
multiple benchmark datasets validate the effectiveness and flexibility of our
methods. Code is available: https://github.com/Rorozhl/MMKD.
