Masks to be optional at Collierville schools (Source: Smith, Courtney) By Olivia Gunn | May 12, 2021 at 4:19 PM CDT - Updated May 12 at 4:40 PM COLLIERVILLE, Tenn. (WMC) - Collierville Schools announced that masks will become optional effective Monday, May 17 for students and employees. The decision comes after Governor Bill Lee and the Shelby County Health Department announced the mask mandate will change from being a requirement to a recommendation. According to the school district, there has not been a confirmed student case of COVID-19 since early May and all staff members have been given the opportunity to be vaccinated. Collierville Schools will continue to encourage students and staff to maintain social distancing and frequent handwashing while its Coordinated School Health division continues to manage and monitor district-wide mitigation strategies.