I was let go as substitute teacher because I corrected my students' grammar

A parent reported that a student had videotaped me on his cell phone. So, no doubt if there were a hint of unethical practice — singling a child out for ridicule, touching anyone, or making unreasonable demands — either on the video or in student testimony, my infraction would have been fully detailed.

Nothing.

What students apparently objected to was me handing back their papers, hectoring them about language errors. I told them unapologetically, “This is your native language, people! Second grade mistakes — not distinguishing between ‘your’ and ‘you’re,’ misspelling ex(c)ercise, leaving off caps and periods — from freshmen and sophomores are unacceptable … ”
School classroom with blackboard