Before leaving their expert groups, each individual should be able to address the four considerations for large-scale data for their particular phenomena and be ready to explain it to others. Use the 2.2 Assessing the Expert Group Worksheets to assess the student’s ideas. At this point, the students may have questions about the phenomenon in their groups, and at the end of the activity they will have had no formal support from you as a teacher in understanding these phenomena. We recommend looking over their worksheets to see how well they were able to navigate the data in their expert groups. You will also have a chance in the next activity to formatively assess their ideas when they share their expertise with their home groups.