These ones is becoming common!

[TeachEnglish2]

My mother always taught me that to say 'these ones' was improper English! Now I hear it from young and old, everywhere I go. It bothers me that it might become accepted practice due to it's rampant use!
What am to do? I want to correct them!

[Barb_D]

You understand that English is an evolving language right? Things that were correct a century ago are incorrect today (or are at least noted as "archaic") and things that were incorrect a century ago are now correct.

There's no point in saying "Oh no! The standards are dropping. People are speaking the language the wrong way!" In fact, the way people speak it is the way they speak it and eventually, whether you like it or not, something may become standard. Or that use that makes you crazy may fade away.

The other day someone complained about an "incorrect" pledge about playing fair. I said it was fine. They said "That's not the way the nuns taught me and they wouldn't have stood for such sloppy language use." I showed them in the dictionary that "fair" was an adjective as well as an adverb.

Save your angst for things that are actually important, and realize that the number of native speakers who will respond kindly to your attempts to "correct" them is infintesimal.

[Raymott]

My mother always taught me that to say 'these ones' was improper English! Now I hear it from young and old, everywhere I go. It bothers me that it might become accepted practice due to it's rampant use!
What am to do? I want to correct them!

Also, it's not wrong. That's an even better reason not to correct them.
I don't mean to be rude, but you say you're an English teacher. Didn't your training go beyond telling you to teach what your own mother taught you?