Tens and ones is old fashioned, I would have thought. My grandma, a retired Head, used to tutor me when I was young (23 years ago or so) and I remember her using tens and ones. I guess ones is misleading, as obviously other digits might be in the 'ones' column... Hmmm. Not sure. Do know that place value continues to be an area of massive weakness in every year group in every school I've worked in!
As a school we have all started saying units. New teachers were saying units and we were saying ones so we have all standardised now. It's much better because it's very confusing saying to 5 year olds e.g. how many ones are there in the number 12?