When did teaching English become 'language arts" and why?
Is she teaching English or not?

"No longer" But you did until your conscience caught up with you? Better late than never I suppose. But they damage you condoned up until this point may never be repaired. You have failed in the sole responsibility given you by your chosen profession, no making amends to sooth your conscience.

Don't know the answer to the first question; it's related to the demands that certain social groups have that one call them by the "right" name, which only they know and use and if you're use the "wrong" label, nothing you say is valid. It's kinda like musical chairs, but with words. Just ignore it like the meaning-free noise it is.
The question I always have about standardized testing [ST] is that someone is going to use the results for something, and it has very little connection to the real world - MOST adults don't take them, & anyone who looks closely at them sees quickly that all they are is a snapshot of one specific moment. Further, some people are better at ST than others - I see a test as an opportunity to show off.
and the poor teachers! They did it to themselves of course, but if you're going to hold up a PhD in education as having meaning, you have to go by what the PhD says. And these days, They are saying "testing 'works'" & you oughta do it Even though it's irrelevant and horrible, you have to do it.
Grrrrrr.
Free the children! Free the teachers!