Y U DUMB? Elementary School

Y U DUMB? Elementary School is a fictional school located in Pensacola, Florida, which many characters in the SML franchise attend. It was first seen in "First Day Of School!", with its exterior seen for the first time in "Jeffy Gets Hypnotized!". It is named after one of Jackie Chu's most commonly said phrases. At the beginning, the students were Junior, Jeffy, Joseph, Cody, Toad, Bully Bill, Patrick, Toadette, and Atso.
It is a common setting in the SML universe and is most frequently used in scenes in episodes revolving around Bowser Junior and the gang or Jeffy whenever they are in school.
Although it is unknown if there are other faculty in the school, the only known staff are Jackie Chu, Principal Steinbeck, and Chiquita.