Exploring language provides us with one approach to better understanding the practices and beliefs of a community. With advances in technology--specifically, computational text processing and machine learning tools--we can now examine written language on a large scale. In this study, we investigate the language of mathematics teaching and learning in the USA over a decade (2009-2018) by analyzing text from articles published in "Mathematics Teaching in the Middle School." Our analyses explore the terminology used by middle school teachers and teacher educators to discuss their practice, revealing terms that are used widely, terms that have largely been absent from such writing, and terms that have shifted in usage over the past decade. This research provides insight into the zeitgeist of mathematics teaching and learning during a particular period of time, while also suggesting a fruitful approach to examining language as a means of uncovering the beliefs and practices of a community.