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