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Students will determine from three math statements which two are true and which one is the “lie.” Each lie has a common mistake from order of operations, radicals, expanding binomials, and more. After the students determine which statement is false, they will justify their answer by describing the mistake that was made.
Altogether this activity takes 15-20 minutes. To turn it into a whole lesson (and to make it more fun!), before the students do the activity, have the students write their own two truths and a lie about themselves and have them read them to their groups to get to know one another.
In addition, after students are finished, you can create a public record or anchor chart of mistakes and how to avoid them together as a class as you discuss the answers and answer questions.
If students finish early, they can work on the extra practice included.