With mask-wearing mandates in place for every student, except in some cases those with disabilities, many school districts are now banning the use of masks with valves or exhalation vents.
Those "are not recommended, as they can allow exhaled respiratory droplets to reach others," according to the New York State chapter of the American Academy of Pediatrics.
The Bridgehampton School and the Sagaponack School are among those that are following that organization's guidelines.