How to do these exercises
Some of these exercise types may be unfamiliar to you.
In all the exercises you will see a help icon similar to this one:
If you don’t understand how to do the exercise, click on the icon and a short, video tutorial will appear.
Click on the player to start the video.
The video will show you how the exercise works technically.
It won’t give you help with the English content of the exercise.
The videos are silent so that they can be understood by people of all nationalities.
Other problems and questions
If you have other problems or questions, write them, in any language (that is, one for which I can easily find an on-line, automatic translation), in the Comment box here or in the one under the exercise.