The Kindergarten Teacher was a teacher that works on the school of Tommy, Lola and Gus. She isn't a teacher of them.
She comes across as a nervous wreck that really hates her job as Kindergarten teacher. She looks tired of the pranks that the preschoolers are putting on her and it looks like she can't keep them under control.
- In the episode Gus's Big Mouth it seems like she has quit her job and that she has a new one. She can be seen as a ticket seller at the cinema.