I agree, math and science are the most difficult to handle online. There’s no teacher to walk around the room and make sure equations are set up correctly... And don’t even get me started on virtual “science labs”.
My sister teaches college chemistry. She said the American Chemical Society is demanding virtual lab courses have a special code on transcripts. Students with too many will be labeled “deficient” for future credentials.
We’re seeing the simple case of algebra 2 and chemistry education hindered by being virtual. A teacher can point to a printed page and say put the 2 here, not there. Right now, they scan or take a picture of the page they printed out, upload it, and the teacher types up feedback. Slow, awkward, hard to understand.