Ubly and Cass City schools moving some students virtual due to COVID Mary Drier, For the Tribune March 15, 2021 FacebookTwitterEmail (Eric Young/Tribune File Photo) As COVID numbers climb once again in the Upper Thumb, several school districts have been feeling the effects. That includes both the Ubly and Cass City school districts, both of which are going virtual due to quarantined students and a shortage of staff members. “We have about seven or eight kids who tested positive and about six to seven staff members also,” said Ubly School District Superintendent Joe Candella. “Because of that, we will be going virtual this week.”