During computer time, allow kids to input their habits in each of these categories and see what they come up with. It is advisable to walk students through using the calculator the first time they do it, accompanying each step with explanatory statements. After they’ve calculated their footprint, invite them to try again, this time modifying one category at a time to see how they could most easily reduce their number.

After they understand what a carbon footprint is, a good next step is to lead them in a discussion about how people everyday choices impact the environment. On the board or in small groups, invite students to come up with ideas about actions that might contribute to their carbon footprints, such as leaving unused electronics running or buying single-serving drinks and snacks. When children have produced a sufficient number of ideas, have them add alternative actions that lower their carbon footprint.

Invite students to make individual posters showing an action, or several, that they and their families can take to reduce their carbon load. When the posters are completed, display them in the classroom or hall before sending them home with children.

Children love nothing more than telling their families what to do, so sending them home with a carbon checklist for the week is bound to get their attention. Example could include “use a refillable water bottle instead of buying bottled water,” and “Unplug phone chargers when they are not in use.”