At the end of the learning period
Regular one-on-one discussions can be used to go through the individual goals of the learners, and at the same time learners have the opportunity to describe their own views on their knowledge and studying skills. This will give them the feeling that they are being heard, and they also have the power to decide on their own learning, hence on their future.
In addition to the evaluation discussion, a traditional test may be organized, but it can also be based on self-evaluation and it may not necessarily be taken into account in determining grades.
One practice is to organize a "mock test" instead of a final exam or a course test, with the aim of developing the learner's understanding of their skills. A mock test is an ordinary course test, but the learner themself checks and at the same time evaluates their level of expertise. The teacher does not grade it, nor does the learner get a grade based on it.
When a course test is based on self-evaluation, the teacher does not have to supervise it, but can simultaneously conduct evaluation discussions. With this arrangement, the teacher is able to arrange evaluation discussions within normal working hours.