Consumable. The Science H Instructor's Guide includes one set of these consumable sheets . You need one set per student. If you might reuse your Instructor's Guide and Student Activity Sheets in the future (for a younger child, for instance), we strongly suggest that you purchase an extra set of Activity Sheets when yo Sonlight resource: https://www.sonlight.com/products/extra-science-h-student-activity-sheets-4-day