How does one evaluate one's own online teaching? Do novice online instructors depend on end-of-semester course evaluations or a Quality Matters rubric? Perhaps their professional development is driven by a personal belief that seeking multiple perspectives from different lenses is core to reflective practice. This work explores one way to interrogate one's own online teaching practices through a systematic reflection on technological pedagogical content knowledge (TPCK). It involved identifying and reflecting upon instances in which TPCK was evident in the design and facilitation of the online learning environment in an undergraduate online course. Ways to improve online teaching based on increased meta-cognitive awareness of TPCK are considered. Implications of this self-study for distance learning professional development are discussed.