While renovating/making repairs, when possible, perform work at times when the occupants are not in the building, such as vacation breaks, weekends, or evenings. Schedule construction activities while school is out of session, or ensure that building occupants are temporarily relocated to prevent exposure to harmful chemicals, dust or particulates. Keep building occupants as far from renovation activities as possible. The greater the distance between pollutants and occupants, the less concentrated the pollutants will be upon reaching the occupants.
For more in-depth details, visit: https://www.epa.gov/iaq-schools/renovation-and-repair-part-indoor-air-quality-design-tools-schools.