Preteach
The teacher’s first responsibility is to teach students about the rationale for and structure of a problem-based approach to language learning. For students who are accustomed to more traditional, teacher-centered classrooms, it is critical that they know they will be given direct, follow-up instruction, but that during the problem-solving phase, the teacher’s role is to observe and support. Students also need to understand that their goal is to work together to solve a problem, but for the activity to benefit their language learning, they must use only English in their groups