William Tyler Griffith, 28, of Dublin, was arrested early Wednesday.
Schools are using this data and other assessments to provide targeted instruction and additional support to students. Many divisions plan to increase in-person instruction.
Several school systems, including Roanoke County's, have reported an uptick in COVID-19 cases over the past two weeks. Others have reported no or few new cases.
Salem's pre-K to second graders will be in school five days a week starting Aug. 31, while third to 12th graders will attend two days in person and three days online per week, in a plan that can be adjusted to changing circumstances.