Can someone please correct my spelling mistake and grammar errors?

From presenting the STI/STD campaign the audience gain a lot of health related learning, it explored their values and attitudes, promotes self-esteem and self-empowerment, provided knowledge and skills for change, change beliefs, change attitudes, change behaviours and change of lifestyle. It modifies their views, raising awareness, broadening their knowledge. It improves their knowledge of individual who are listening to the presentation and learn how to discuss STI. It provides an opportunity for a group of members from a local community to discover attitudes to discover the facts about sex and unprotected sex. It increases self-awareness and self-belief in- of people from a local community in order to encourage them to be active in decision- making in that community. It builds up the essential knowledge and skill of individuals to enable them to stop having unprotected sex for a period. It decreases individuals holding negative views about vaccinations and condoms through the presentation led awareness event in the class. It increases the numbers of individuals who are considering having sex subsequent to an awareness rising nationally. It increases the number of young people who are using condom when having sex.