Divide students into groups of three to four. Students divide into groups. Give each group a map and a set of marking pens. Have each student predict the source of the outbreak. Tell each group that they are to use the victim cards and the map to locate the source of the Hepatitis A outbreak.
Students predict the source of the outbreak.
Students study victim cards and work on locating the source of contamination. Allow students 20 minutes to study the victim cards and mark their maps. Students study victim cards and mark their maps. Prompt students who have not yet begun marking their maps. Students continue working.