The widespread presence of mobile phones in people's lives has changed significantly the lifestyles of today's society. Particularly for young people, the ubiquity of mobile phones and the frequent use of this technology is a central element of their lives.

Young people’s use of mobile phones in informal contexts include digital practices, such as managing multiple sources of information, handling various types of media and working in collaborative networks. These practices enhance the development of essential skills in today's society. The educational use of a device owned by young people, highly personalized and used intensively in informal contexts, reinforces the link between informal and formal learning contexts. However, the school remains as one of the unique contexts of young people’s lives where mobile phones are usually prohibited.

This research project focuses on the use of mobile phones in education. Taking m-Learning as a reference, the purpose of this research is to identify and analyze the functionalities that young people already use in their mobile phones and to propose educational applications based on them. A case study, based on the representations and practices of the use of mobile phones in school, was implemented with young people and teachers of the 3rd cycle of education of a school in Setúbal, Portugal.

KEYWORDS: m-Learning, mobile phone, teenagers, educational context, case study.