She is a English teacher at Medford high school. She is Sheldon and Georgie Cooper's first period English teacher. She had a hard time dealing with Sheldon for example in A Sneeze, Detention, and Sissy Spacek she told Sheldon to stay in his seat however Sheldon was about to leave the classroom because she sneezed and he did not want to get sick and because of this he left the classroom. In season 2 of Young Sheldon it is revealed that Ms. McElroy has Sheldon in her English 2 class. Just like all the other teachers and the Principal, they want Sheldon out of the school and complain about his disruptive behavior.