What does it mean when someone says, “don’t judge a book by its cover”? In this lesson, you will learn the meaning of the idiom, “don’t judge a book by its cover,” by looking at a cartoon. Let’sReview Review Let’s An idiom is a phrase or expression that cannot be taken literally. A Common Let’s Review Mistake Barked up the wrong tree X Core Lesson Let’s Review Don’t judge a book by its cover. Just because Sarah is really pretty doesn’t make her a snob. Core Lesson Let’s Review The idiom, “don’t judge a book by its cover” means do not judge people by what you see on the outside. Core Lesson Let’s Review She’s really pretty. She must be a snob. I hope they don’t think I’m mean. I’m really nice. In this lesson you have learned the meaning of the idiom, “don’t judge a book by its cover,” by looking at a cartoon. Guided Practice Let’s Review Write a sentence that includes the idiom “don’t judge a book by its cover.” Extension Let’s Review Activities Draw a picture that illustrates the meaning of the idiom, “don’t judge a book by its cover.” Extension Let’s Review Activities Write a story about a time you judged a book by its cover. What happened? Quick Quiz Let’s Review Write a paragraph that includes the phrase “don’t judge a book by its cover” and shows that you understand the meaning.