Center School District to require masks for students, staff Charlie Keegan and last updated 2021-07-28 20:33:14-04 KANSAS CITY, Mo. â The Center School District students and staff, as well as anyone on district property, will now be required to wear a mask. Visitors also are no longer allowed on campus as of Tuesday, according to a letter sent to district families. Other COVID-19 mitigation efforts remain in place, including requiring parents and employees to report confirmed virus cases to the district and free COVID-19 testing, among other policies. More information can be found on the