How do you welcome students back after a long vacation/break?

In my role as a math interventionist (although looking back I did it as a homeroom teacher, but I don't think as intentionally as I do it now), I have found that many of my students can do the math, they just don't believe they can. As educators, we wear so many hats and one of them is helping students see their potential. I now ask students when they answer a question for me: "Are you asking me or are you telling me?" This questions prompts students to be more convicted in their answer to me. Or if they aren't sure about their answer, it prompts them to go back and recheck it. I have the conversation with students that if they aren't sure of their answer then they need to take a second look at it. They should always answer confidently if they did the work. If it's wrong, we will figure out what happened. It has been so rewarding to hear teachers say that their students are more confident in their answers when sharing in class.