What is one area in which you'd like to improve professionally? What steps might you take to improve?

Don't say that you can't think of any areas for improvement. Explaining how you could improve doesn't mean you aren't good enough for the position you're seeking; it means that you pay attention to what is happening in the field and what skills or knowledge those in higher positions have that you haven't yet acquired.

"I've noticed that some of the leaders in the field use restorative justice models, and while I have some understanding of the concept, I don't know how to facilitate a restorative justice process. I would love to explore the possibility of being trained so that I could help add restorative justice practices to our available services."