Jansen and Liddicoat's volume on teachers as researchers in the FL/SL classroom is an invaluable contribution to the complex and complicated issue of assessing formal language learning environments (i.e., classrooms). The purpose is to provide “an overview of the philosophy which underlies the inclusion of research as a central part of an in-service professional development program” (p. 1) as well as to “give examples of the scope and potential for research conducted by teachers” (ibid.).