Teachers from overseas might be smarter and care more. I dunno.
Yes, you don't know.
At my daughter’s high school the best teachers she had were filipinos, who were much more traditional, probably because of being raised Catholic or some such.
I would imagine, in addition to the H1B deal, that many teachers are tiring of the commie curriculum they are required to use. Not all teachers are the devil. One of kids had a math teacher who taught old school math instead of the convoluted crap they’re trying to confuse them with now.
Increasingly, the classrooms are becoming politicized. I imagine there are many teachers who just want to teach and go home instead of dealing with that crap in addition to unruly or violent students they aren’t allowed to kick out of class because “muh racism”.