Provide original groups with butcher paper and colored marking pens. As a lead-in to further work with this unit, direct them to brainstorm what they already know about volcanoes and volcanic eruptions. If they are unsure of their information, or as they have questions, have them circle those items in their brainstorming list. After ten minutes or so, have groups share with the class their questions and needs for additional information about the topic. Post a composite list of questions in the classroom, so that you can refer back to them as the unit progresses.
Unanswered questions can also be the starting points for students' final independent projects.