Is that a Concept Checking Question you're asking?

Something the CELTA folks are very big on is asking questions to confirm instructions are understood, and to check concepts. So are they big on asking questions? What two things do they like to ask questions about?

The problem with this is that I have started doing it in real life :0. The classic correction by saying "Do we say, I do a mistake?" Great in the classroom: patronising as hell at the dinner table. Must stop doing it.