My wife used to teach reading to elementary aged children with reading comprehension issues. And she found that you cannot teach children how to make letter sounds via Zoom. They cannot see, hear, and experience the inflections and mouth/tongue movements required.

The result is these children don't learn how to read. And studies have shown for ages that if a child is not a proficient reader by grade 3, they will likely never be proficient, ever.

That's just one of many costs. We're leaving these children behind.