At the beginning of this course, I got a list of links to the websites where I can study grammar. I have now reviewed the different websites and it seems that many of the sites contain some additional fees.
So far, I have found out and completed some grammar activities from the following free sites:
Both BBC and Yle have a lot of study material and quizzes. I especially liked quizzes for then I always got a clear result at the end of the quiz.
I feel that it really was the time to repeat a grammar a little bit. Despite the study level I chose, I always got one question wrong in every single quiz I took. However, based on quizzes in BBC’s site, my grammar skills are at least on a level C1 (there weren’t more tests to challenge myself further).