Mrs. Sheer was a minor character that appeared in The Third Wheel. When the senior citizens arrived at the dance, they claimed they had booked the gym for a meeting. Mrs. Sheer said the gym had already been reserved for a school dance two weeks before, but the Seniors told them they booked it two months ago, and had paperwork for proof. So the gym was partitioned in order to prevent a fight from starting between the seniors and the students. She also had to fish out someone's contact lens with a spoon after they lost it in the chocolate fountain.
- Diary of a Wimpy Kid: The Third Wheel (First and only appearance)