The Madison teachers union is signaling strong opposition to a return to in-person learning, even as local public health officials havenât reported any school-linked COVID-19 hospitalizations or deaths and as some private schools that have been open for in-person instruction since the beginning of the school year report few major pandemic-related problems. The Madison School District has also refused to release many details about the experience of a subset of students who have been receiving care and academic help in school buildings since September â potentially crucial information ahead of a decision on whether there will be a broader return to classrooms this month.