First of all you'll need to register with your nickname (use your whole name as nickname), mail account and password. Now you are part of my group of students. Go to Videos and click on Ana Mendez (Galileo Galilei) Channel.
Choose at least three videos in my channel of your interest and record your voice to obtain the highest number of points over this week. To start with, your challenge for this week is 2,400 points.
To do it properly, the best way is:
1.- Try watching all the video hiding the subtitles. If it is too difficult, you can make use of the subtitles the second time you watch it.
2.- Click on "Pause video after each line", play the line as many times as you want (you can even hear the line slowed down) and then click on the red "record" button to record your voice.
3.- When you have finished, click on stop and see the result. If the words are yellow, it means you didn't pronounce them properly. If you click on the yellow word, you will listen how it should be pronounced and how you did it.
For the moment, use practise mode and not quiz mode, which is a bit more difficult.