HARRISBURG (AP) – Pennsylvania school districts that plan to start the year off virtually are facing a potentially thorny issue: What to do about bus transportation for students of private and charter schools offering face-to-face instruction. Some districts say they’ll continue to take these students to school, as usual, even though their own campuses are closed. But other districts plan to cancel bus service until their own students return to brick-and-mortar classrooms, potentially stranding the private and charter students they are required by law to transport. The state Education Department says it plans to issue guidance on the issue.