"Technological Pedagogical Content Knowledge (TPACK) attempts to
identify the nature of knowledge required by teachers for technology integration in their teaching, while addressing the complex,
multifaceted and situated nature of teacher knowledge. At the heart of the TPACK framework, is the complex interplay of three primary forms of knowledge: Content (CK), Pedagogy (PK), and Technology (TK)."
-Matthew Koehler
In the model we can see how technology, pedagogy and content knowledge are related. In TPACK teachers plan lessons that address each of those areas. Visit Matthew Koehler's site to learn more about TPACK http://mkoehler.educ.msu.edu/tpack/what-is-tpack/