As teacher educators have begun to recognize and acknowledge the complexity of teacher knowledge for technology integration, currently conceptualized as technological pedagogical content knowledge (TPACK), researchers are exploring multiple ways to help inservice and preservice teachers develop this highly situated, interdependent professional knowledge. In this article we overview the Learning Activity Types (LAT) approach to TPACK-building that we have developed and are testing, documenting how we utilize the approach in differentiated ways for preservice and inservice teachers.