There are several options: practice, testing, competition.
- TESTING
Here you can select the (grammatical, lexical, discursive) domains of which you would like to test your knowledge. You work through the number of exercises that you selected without help and when you are finished you get a final score. As a registered user you can enter these scores into a monthly chart of top scores and maybe you will even win a prize with your score. Then you get to see which questions you answered correctly and which you did not and in a second round you can try to correctly answer the questions you got wrong the first time.
- PRACTISE
Here you can select the (grammatical, lexical, discursive) domains of which you would like to improve your knowledge. You are allowed to consult all kinds of help: feedback (which will lead you to other related exercises), dictionary and the correct answer.
- COMPETITION
Here you are participating in a "contest" or "competition." You follow the guidelines set by the organizers. Usually, you can solve the questions and review your answers afterward. Once you have finalized and submitted – you will receive a warning for this – you can no longer make any changes.