In this exercise, students will write energy-related questions on recipe cards and post them to a bulletin board labelled the “Great Wall of Energy.” As students learn more about energy efficiency, they can take down the question from the Great Wall of Energy, write their answer on the back of the post, and move the flipped cards over to the “Greater Wall of Solutions.” By the end of the Generation E experience, students should be able to answer all the questions on the Great Wall of Energy.