I am teaching "conventional" in person classes here in MD, where students travel from all over the country to come here, and we follow the accepted and proven protocols- including testing, social distancing, and masking up in the classroom, and have had no issues. Granted we have smaller classes, so it is more conducive to keeping students 6+ feet apart, etc, but there is also potentially more risk by bringing students here from all parts of the US. We are a year into this thing now, so it is not like we don't have a clue how to deal with it at this point. The difference is I teach professionals in the maritime industry, and not a bunch of kids. That being said, it clearly can work with minimal risk by implementing effective control measures.