The document discusses good and bad students. It introduces several students - Carol, Leo, and Andy. Carol and Leo are good students who don't shout or write on desks. Andy is not a good student because he sleeps and shouts in class. The document then lists things that students don't and do do, like drive cars, cry, make breakfast. It provides practice sentences filling in blanks about what students don't and do do. Finally, it prompts asking questions about what different students and the teacher don't and do do.