The document introduces Bart and his family and friends. It teaches about using the present simple tense to describe people and things. Bart talks about himself, his friend, his dad Homer, his mom Marge, his dog, and his sisters Lisa and Maggie. It provides examples of how to use is, are, am, I'm, you're, he's, she's, it's, we're, they're and questions using these verbs. It has exercises filling blanks with the correct present simple form.