Based extensive fieldwork and interviews, this study explains teacher evaluation policy enactment as shaped by three conditions: (1) a principal's backgrounds, role perceptions, knowledge of instruction, and interactions with teachers; (2) teachers' perspectives; and (3) environmental demands. Notably, principals may lack the backgrounds,…

This article is a digital video design ethnography describing the first phase of introducing a perspectivity meme into a classroom. A meme is an idea that spreads throughout a system. A perspectivity meme is the idea that people who share their viewpoints and interpretations will gradually affect role changes in the learning environment. They will…