You can do this activity after introducing and doing some practice on the modal 'should'.

- Ask students to take a piece of paper and write a problem they have. It's best if it is a real problem, but they can obviously make something up if they don't want to talk about their problems in class.
- Ask each student to write a nickname.
- Collect the pieces of paper in a box, mix them up a little, and give them back to the students making sure that nobody gets their own paper back.
- Ask students to write some advice for the problem they receive.
- When they are finished writing their advice, ask students to read it out for the whole class.