Nancy is the twenty-eighth chapter of Sideways Stories From Wayside School. Nancy (who is a boy) trades names with his girlfriend Mac (from the 23rd floor, who is a girl), but when the rest of the class hears about this they want to trade names as well. They do so, but due to the confusion created, nobody knows their new name. Ultimately, everyone in the class agrees to just use their original names. Only the three Erics are unsure of what their original names were.
- Mac (last appearance as Nancy)
- Nancy (debut, last appearance as Mac)
- John (mentioned)
- Nancy's teacher (debut)
- Jason (temporarily as Terrence, claiming to be Maurecia)
- Maurecia (temporarily as Mrs. Jewls)
- Mrs. Jewls
- Eric Bacon (temporarily as Leslie)
- Joe (temporarily as Deedee)
- Rondi (mentioned)
- Allison (mentioned)
- D.J. (mentioned)
- Eric Fry (mentioned)
- Eric Ovens (mentioned)
- None yet.