This strategy is a good way to review content from a lesson, topic or unit of work.
Have students work on their own, pairs or small groups. They must write 2 true statements about something from the content area and 1 statement that is a lie.
Other groups / pairs have to listen and guess which statement is the lie. They then have to say why the statement is a lie and justify their reason.
This activity is particularly useful as it gets students to practice all four skills of speaking, listening, reading and writing.