三学或三艺（拉丁文：trivium，意为“三条道路”） 是欧洲中世纪大学首先要教授的三门学科：语法、逻辑和修辞，构成中世纪博雅教育的基础，为进一步学习四艺做准备。

The Trivium is a systematic method of critical thinking used to derive factual certainty from information perceived with the traditional five senses: sight, sound, taste, touch, and smell. In the medieval university, the trivium was the lower division of the seven liberal arts, and comprised grammar, logic, and rhetoric (input, process, and output).