Using screencasting videos as think-alouds, this case study explores the process three high school seniors used when tasked with evaluating digital sources. Drawing from dual level theory of literacy, the study explores the complexities involved when students are asked to conduct informal research of their source (a strategy called lateral reading) in order to improve their ability to uncover potential bias in digital sources. Results indicate that lateral reading encouraged healthy reader skepticism and slowed readers down in the review, but students lacked sophisticated online reading and research strategies.