Miss Pumphrey was an elementary school teacher.[1] She was first introduced in Ender's Game.
History
SPOILER WARNING: plot details follow.
Ender's Game
Miss Pumphrey was the teacher of many students, most notably Ender Wiggin and Stilson. She would often let Ender doze off in class, knowing that he would be able to answer any question she asked him, even if he were not paying attention.[1]