OXFORD â South Granville High School will need a new principal for the 2021-22 academic year â potentially a critical one because of ongoing school-merger discussions â thanks to a personnel shuffle in the Granville County Schools. District officials announced that Northern Granville Middle School principal Brenda Williamson will be moving to take the same post at C.G. Credle Elementary School as of July 1, and that South Granville High principal Lisa Tusa will replace Williamson at Northern Granville Middle. The position swaps began because Credleâs current principal, Sherrie Burns, is resigning so she can move to Pitt County, district officials said in announcing the changes.