This document discusses the unit approach to teaching. It defines a unit as a small group of closely related content that is delivered by the teacher over a few minutes. A 40 minute lesson should have 2-3 units. The document outlines the definition of a unit according to C.V. Good, the merits of the unit approach including catering to learner needs and abilities and allowing for flexibility, and limitations such as units requiring careful planning to avoid becoming isolated facts.