Start quizzing yourself and work your way up to the highest levels. There’s no easier way to learn than through the trial-and-error method. Be cautious, though! Don’t get too hasty. You can only make 3 mistakes per quiz.
If you want to check whether you are on the right level for a quiz before you take the quiz, you can visit the “Short Stories” section. There is one Short Story for each quiz which presents some of the vocabulary and the grammatical phenomena existing in the quiz. If you understand the gist and the words in bold, chances are you can pass the corresponding quiz. So, read the story first, get an idea of what the quiz is about, and then give it your best shot!
Note: While this site is accessible on all devices, it is highly recommended to use your phone for the best experience. Scroll down and add the app to your phone’s home screen for offline and quick access.