Take a look at the vocabulary list in your student book on page 130.
1. Which words did you note done in Step 1?
2. Find the description / translation of the words you're unfamiliar with and practice + learn them.
Pay extra attention to the words under 'quantities'.
3. Go to your word cloud (mind map) of Step 1 and add the words you learnt. Now you have your own vocabulary list of Unit 3!