We introduce an interactive procedural-style debugging approach foranswer-set programs that avoids the negative aspects of non-declarative debugging of ASP. It is based on an intuitive computation model that allows a userto follow his or her intuition by stepwise determining which applicable rules areconsidered to be supporting rules. Moreover, we define the notion of a breakpoint for answer-set programs that allows to start stepwise debugging of a program Πfrom an answer set of a subprogram of Π.