Miss Alordayne Grotke is the teacher of the fourth graders at Third Street School. Warm and kind but somewhat eccentric. She is adored by her pupils because she is possibly the only teacher who stands up for the students. She performs magic tricks at clubs as a hobby. Miss Grotke loves to meditate and she has an over bite like Gretchen. In "The Substitute", When she was absent from school for a few days, everyone except T.J. forgot her until T.J. presented his independent study project, a "get well" card, saying how she had helped them, from healing their roots to helping them with times tables. Her hippie outlook is reflected in her appearance with her long robe-like dress. In Recess: School's Outit is shown that she is secretly trained in some form of martial arts, which impresses Miss Finster, who develops a newfound respect for her. She believes that T.J. and the gang are high spirited children who are not rotten.
In Operation Field Trip, the codename that Miss Grotke uses to communicate with the dispatcher is "Earth Mama".
It is clear that, early on in the series, the actors were not told how to correctly pronounce her name, as in the earliest episodes her name is pronounced "Groh-t-kee" and in later episodes she is called "Grow-t-kee".