At some point, language teachers need to be engaged in language assessment in their profession. Because language assessment is such a primary task for teachers, the field of language testing is encouraging research around the knowledge, skills, and principles that are foundational for sound assessment. In this paper, I provide a definition of Language Assessment Literacy (LAL), especially when it comes to teachers, by reviewing existing models. I then discuss ongoing issues in this area and end the paper by offering language teacher educators suggestions for fostering LAL among pre- and in-service teachers. In the article, I argue that, if more LAL initiatives take place, we are collectively raising the status and nature of language assessment and its impact on teachers’ professional development.