Aging heating systems have become increasingly difficult to maintain, Durham Public Schools says.
Teach For America North Carolina hosted a panel discussion after visiting a school in Edgecombe County.
Educators said schools are struggling with limited resources and staffing shortages that affect students' academic success.
North Carolina is the only state in the country that has not passed a state budget, which affects teacher raises and education funding.
More than 800 Cumberland County teachers and staff are expected to join a statewide walkout in Raleigh on Friday.
Organizers on Wednesday described the situation as a "crisis."