TribLIVE's Daily and Weekly email newsletters deliver the news you want and information you need, right to your inbox. Leaders in the Hempfield Area School District once again postponed a full return of middle school students as covid-19 cases remain high. Rather than returning to in-person classes five days a week starting Jan. 19, students will continue indefinitely with the hybrid model, or a mix of in-person and online classes. In a letter to parents, Superintendent Tammy Wolicki and Assistant Superintendent of Secondary Education Matthew Conner attributed the postponement to community spread, presumptive and positive cases continually reported at schools and the possibility that school buildings could have to close depending on the number of positive cases.