This chapter argues that for the science of learning to become a fully "human" science, it needs to move from viewing learning from an exogenous perspective to an endogenous one. Taken from Latin, the term "endogenous" translates roughly to "from within," and in the meaning the author gives to it here, it refers to a perspective on learning from the perspective of learners. The exogenous approach examines learning "from without," and it is the dominant approach to understanding learning in the field, from Thorndike's behaviorism to the current day. In this chapter, the author traces the roots of an endogenous science of learning and develops concepts and techniques for conducting research on learning as a members' phenomenon (LAMP). This examination is anchored by a detailed analysis of a single interactional segment. His analysis of this segment leads him to treat this as a simplest case of LAMP, thus establishing something like "criteria for an ethnographically adequate" account of learning. Issues and future directions for an endogenous science of learning are also discussed. (Contains 1 figure and 1 note.)