This grade 4 comedy reading unit (level R) is about a funny misunderstanding between a customer and a company over the difference between pigs and guinea pigs. Students learn about comedy as a literary genre and do a literary analysis that focuses on puns and word play. The unit contains teacher support pages, a reading selection with supporting illustrations, and activities to guide students in close reading of the text. Students also gain practice applying topic and academic vocabulary. The unit concludes with a reading comprehension activity and a text-based writing activity.