Hi there!
1) If you're done with your final task on Unit3, think about the word "Progress" and note down all the words it evokes to you.
2) Use Wordereference and Visuwords to add a few words to your list.
3) Use Wordereference and/or RealSpeaker to check the pronunciation of the words you listed and add a few symbols to help you getter better at pronunciation. You can use
Fabien Snauwert's interactive chart too if you want!
4) Practice and learn the vocabulary list you've just created!
5) If you're finished, try and list a few examples of dumb inventions.