Introducer--Is the leader and organizer of the group. The introducer's primary responsibility is to make sure progress is being made by each member on the objective. The introducer also states the point-counterpoint in general, using his or her own words, and gives a "lead-in" for the point-counterpoint by describing the topic in the text to which this particular issue is relevant.

Summarizer--Describes the specific point or counterpoint to which he or she has been assigned. The summarizer may give a brief statement on the background of the specific controversy and any other important information needed to understand the point-counterpoint.

Illustrator--Has the important responsibility of making the point-counterpoint relevant to the other students through examples, graphs, or in-class "experiments." How is the point-counterpoint important to the people in the class and what is a good way of illustrating the point?

Researcher--Reports any studies having some bearing on the particular side of the point-counterpoint to which he or she has been assigned. Some description of the research is appropriate, but mainly the studies' findings and conclusions should be presented. The researcher should also note important limitations or criticisms of the research.

Fielders--Answer any questions regarding the group's assigned point-counterpoint or the members' presentations. Fielders are also responsible for any important material omitted by a group member. Because fielders can be asked questions about members' presentations, it is a good idea to know what the other members are going to say.