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The improvement of the productive powers of labor, and the greater part of the skill, dexterity, and judgement with which it is anywhere directed or applied, seem to have been the effects of division of labor.

I shop therefore I am.

教師不應該像往空容器里倒知識那樣教學，而應該像點燃火焰那樣教學。

圖式是認知的構建塊，組織我們的知識并指導我們的理解。

出自先秦《荀子·性惡》引古語。不知兒子的為人，看看他的朋友就清楚了；不知國君是否賢明，看看他左右的大臣是什么德行就知道了。