This article reports on the Video Viewing Task (VVT), an assessment designed to measure teachers' developing understanding of two reading comprehension instruction approaches: Reciprocal Teaching (Palincsar& Brown, 1984)) and Questioning the Author (Beck, McKeown, Hamilton, & Kucan, 1997). The VVT consists of video excerpts that teachers view and comment on during their viewing. The VVT also includes a series of questions to guide teachers' reflections after viewing.