This document discusses the TPACK framework, which analyzes the combination of technological knowledge, pedagogical knowledge, and content knowledge that teachers should possess. It provides background on the development of the TPACK framework since 1986. It then explains the three core domains - technological knowledge, pedagogical knowledge, and content knowledge. It also describes the overlapping domains that are created by the intersection of the three core domains: technological content knowledge, pedagogical content knowledge, technological pedagogical knowledge, and technological pedagogical content knowledge. The document aims to provide a closer look at each of the domains within the TPACK framework.