This means that they can gradually take more control over the way they learn and, at the same time, you, the teacher, can get a clearer insight into how the students approach language learning. In CEWw , evaluation is introduced in various places. At the lower levels, there are evaluation questions after the students have done an optional Activity Unit. These questions ask them, for example, how well they have worked in groups, whether they liked writing poems and so on. From CEWw 3 onwards, regular Evaluation sections ask the students to think about how they approach different aspects of learning English, such as preparing for tests, doing homework, remembering new language and so on.
Negative questions tend to produce negative answers.
Evaluation by the students requires the teacher to be open to listen and discuss, and make changes if necessary. Initially, it is likely that the students' evaluation of how they have been learning will be very superficial. Just like learning itself, evaluation requires practice. The more they do it, the better they will become at it, and the more able they will become to accept responsibility. You could place a Suggestion Box in the classroom in the second or third week of your course and encourage students to put in it their evaluations of different tasks and texts as they work through a Unit.