My DD's school does it every morning with morning announcements.
Just curious if this is extremely common or more rare these days.
Yes. They say it in the elementary school my son goes to, the middle school my daughter goes to, and the middle school where I work.
I sort of thought it was fairly common, but if you see all of the facebook posts and rants dedicated to our children doing the pledge of allegiance... you would think it was a lost tradition. They do all of the patriotic songs etc.
My daughter's high school did it on the morning annncements but DD said no one said it along with them.