At the end, or towards the end, of the course there will be a test (or tests) to assess your level of Dutch. Your score on this test will be part of your end grade.
The teacher will also consider your attendance, participation in class, Dutch conversation skills and your general progress during the course.
At Direct Dutch, we use the levels of the Common European Framework of Reference (CEFR) to denote the levels of our courses. Read more about the Common European Framework of Reference (CEFR) here.