This is a special election to fill the seat that was left empty by Marny Xiong’s incredibly tragic and untimely death. (She was 31 and died of COVID.)
On the ballot:
Jim Vue was elected by the rest of the board to fill the seat until an election could be held, so he’s semi-incumbent but only barely. (Link goes to the Pioneer Press news bank; should be accessible with a St. Paul library card.) Keith Hardy previously served two terms on the Saint Paul School Board before losing his seat in 2015. (He was also a finalist for the interim position). Omar Syed and Charlie Castro both ran for school board in 2019.
One source that gives some really detailed information on each candidate is Saint Paul Federation of Teachers Questionnaire, available here.