A second chance in the second decade

How to use this website

This website is divided into ten main sections, seen on the multi-coloured menu bar at the top of each screen. The menu bar allows you to move directly from one main section to another. It also provides a reference to where you are on the site at any given time. Each main section is further divided into sub-sections providing further detail on each topic area. You can move between sub-sections using either the menu bar at the top of each page or the ‘next’ button at the base of each page.

As well as the main text of each section, additional resources are available offering further information, illustrations, motion graphics and videos, as well as direct links to supplementary, third-party materials available on other sites. These are indicated by the icons shown below. Holding your mouse over any of these icons reveals a brief description of each resource, and clicking on the icon opens it.

   Further information, illustrations, motion graphics and videos.

   Links to supplementary, third-party materials.

Some motion graphics provide the option to ‘replay’ animated sequences, and to listen to audio descriptions. These are indicated by and respectively. Where hover options/text are available, brief prompts/tips provide reminders of these features. Links are also included so you can easily share specific site materials through social media platforms and/or by email.

Throughout the site you can return to the main text by closing the pop-up resources (i.e. by clicking the 'x' in the top right-hand corner).

Printing of all materials comprising individual sub-sections of the site can be done using the normal print functions of your internet browser. A 16-page summary of the website (PDF file) is available for download here.


If you have any comments/feedback on the website functionality, please send a brief email here

If you have comments or require further information of a technical nature concerning adolescent health, please send an email here


The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of the World Health Organization concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. Dotted lines on maps represent approximate border lines for which there may not yet be full agreement. The mention of specific companies or of certain manufacturers' products does not imply that they are endorsed or recommended by the World Health Organization in preference to others of a similar nature that are not mentioned. Errors and omissions excepted, the names of proprietary products are distinguished by initial capital letters.

All reasonable precautions have been taken by the World Health Organization to verify the information contained in this publication. However, the published material is being distributed without warranty of any kind, either expressed or implied. The responsibility for the interpretation and use of the material lies with the reader. In no event shall the World Health Organization be liable for damages arising from its use.