Led by the teacher of Carmelitas Sagrado-Corazón (Vitoria-Gasteiz) Nerea Martínez de Arrieta the participants in the Erasmus+ Project Think Green had a workshop of Visual Thinking, a technique to express ideas through drawings, images and pictures. Using this resource they created the #ThinkGreenAlphabet about #SustainableTourism to disseminate different terms and concepts in this field trough the social media.