To help alleviate the struggle in choosing effective apps to use in the classroom, Taylor Harrison presents a list of qualities supported by research, that teachers can use to discern at a glance whether an app can potentially be an effective learning tool for their students. This list of qualities was produced through an extensive review of research involving tablets in the mathematics classroom, combined with recommendations from experts and previous evaluation instruments designed for web apps. The qualities presented in this article resulted from a general consensus among researchers and experts. Harrison provides a a discussion of each quality, the justifications behind it, and examples of how an app may or may not possess the given quality.