In this quantitative study, correlational and multiple regression analyses were conducted to examine the technological pedagogical content knowledge (TPACK) development of 299 preservice teachers in response to the technology preparation they received during their initial teacher licensure program. Survey data were analyzed to determine the extents to which preservice teachers' knowledge increased in response to technology preparation and to determine the contribution of individual knowledge components, including technological knowledge, pedagogical knowledge, and technological pedagogical knowledge, to the development of TPACK. Findings revealed that individual knowledge components made statistically significant and unique contributions to preservice teachers' TPACK. Findings from this work help explicate the significant contributions of individual knowledge components to TPACK development and have implications for teacher preparation programs on the use of technology.