Our organization (CEPA San Cristóbal) has a long background experience in developing PBLearning. The projects we have carried out seek to develop our students personal and professional expectations improvement through their integration into their own environment by improving their skills development. These projects always involve the creation of materials and products that are useful in the social environment, such as the creation of an audio-guide of the city of La Laguna, declared a World Heritage Site by UNESCO: http://www3.gobiernodecanarias.org/medusa/ecoescuela/lalagunaaloido/