I really enjoy telling students to ask me at least two questions. I believe it is a stronger question than “Do you have any questions?” because the former already assumes that there are questions out there and it is a little more welcoming. In my experience, “do you have any questions?” usually follow with only a second or two of silence before the teacher moving on. With “ask me at least two questions,” I show students that I welcome questions even if it takes a while for the class to come up with them.
Let me know if this convinces you to rephrase your questions. Thanks for reading!