Maestra Beatriz is Dora's teacher at school. She has a class pet hamster named Mimo. She first appeared in the episode School Pet, as well as Dora's Big Birthday Adventure at Dora's birthday party.
She was voiced by Olga Merediz in School Pet and the game Dora's Cooking Club, followed by Shirley Rumierk in Pepe the Pig's School Adventure. In theoretical future appearances, she will be voiced by Socorro Santiago.