In a two-page letter to the community, Schools Superintendent Bill Burr on Friday cautioned that ongoing staffing shortages, particularly aides and substitute teachers, could push the schools into considering a move to distance learning in lieu of in-person instruction.

“As we have had a number of unfilled positions over the last month, we need to continue looking at the need to move toward distance learning,” he wrote in his letter Friday. “We have worked very hard to keep our schools open during (COVID) mitigation and adversity, but without our educational staff, it will be hard to...