At least 15 students and staffers have tested positive for the illness and 88 others could have been exposed.
Some parents are gathering signatures hoping to oust board members Dave Mattson, Jackie Cranor, Janie Gebhardt.
The educators came in contact over the weekend with a person who tested positive for the disease.
Trustees approved the change Thursday, after Southeastern Idaho Public Health put Bingham County — and six other area counties — at a moderate risk level for coronavirus.
The change will occur after this school year.
The cases, which surfaced recently, put another 150 students in isolation. The Idaho Falls teacher’s union opposes the decision.
The district reopened “as normal,” with various safety precautions in place Tuesday, said the superintendent.