Words are not the sole medium of exchange in teaching and learning. We educate with silence as well. Silence gives us a chance to reflect on what we have said and heard.

语言不是教学的唯一媒介，安静同样可以进行教育，安静给我们机会反省我们所说所闻。

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The following week the children returned to school and apart from a minute's silence and a morning spent learning the words to America the Beautiful, their lives were remarkably unchanged.

BBC: Remembering the Pentagon attack