Reread Chapter 12 where Harry finds and revisits the mirror. Stop at the point when Harry visits on the third night. What does the mirror show? Why do Harry and Ron see different things? Why do you think the mirror is more important to Harry than to Ron? Why might Ron have a bad feeling about going back a third night?
Have you noticed that Erised is desire backwards. What does this mean?
Think about what would other characters would see (Hermione, Malfoy, Hagrid, etc.)? What might you see if you looked in the mirror?
Pick one character and write a description of what they would see in the mirror.
Extension: Write a description of what you would see in the mirror.