The intervention will include an introduction and four educational sessions and will last one month (one session per week) followed by a three-month follow-up. Teens will be allowed to access to a weekly session at any time and as often as he/she likes. However, the sessions will be consecutive, so teens cannot be able to access to the next session without finishing the previous one. Each session has the duration of one hour on average and ends with overview questions. Additionally, at the end of the each session teens will be asked ¿what they like and dislike about the session? And the answers will be recorded in the study database.