Warm-up: The greatest witch of the world A2
It enables training the grades of adjectives (comparative and superlative).
It is a fun way to sensitise to the problem of weak v. strong.
In a circle. Two participants go inside. Each has to persuade the partner that he or she is the greatest witch/wizard. They can use only this sentence. They can use furniture, their voice, gestures, etc. The circle of participants decide who has won the duel by saying: “You are the greatest witch/wizard in the world”.