[Actions to be taken by Governments, the United Nations system and civil society, as appropriate]: Strive to ensure that schools at all levels, other education institutions and non-formal systems of education play a leading role in preventing HIV infection, preventing and combating stigmatization and discrimination through the provision of an environment free of all forms of violence that promotes compassion and tolerance, and provide gender-sensitive education, including on responsible sexual behaviour, and practices, life skills and behaviour change;