Any person accessing the schools, busses or offices of the Grand Coulee Dam School District must wear an appropriate face covering, which covers their mouth and nose. Guidance from the CDC is at https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cloth-face-cover-guidance.html
Specifically, please note that the CDC states:
• Masks with exhalation valves or vents should NOT be worn to help prevent the person wearing the mask from spreading COVID-19 to others (source control).
• The district has face-coverings for those that need them.These are available on busses, at entrance screening locations, and through the health room.