“Energie hoch 4” is a bonus system for schools in Hamburg initiated by the city. If pupils and teachers save resources, not only the environment benefits, but also the schools financially. Everybody is encouraged to save energy and water, reduce waste and heating and teach others about the effects behind it. Colorful media with a bold typography are visible and motivate: Posters communicate the idea, a flyer with a lot of illustrations provides deeper information, a well structured form leads through the bonus system and a set of stickers helps to remember the task on many touch point.
