It's supposed to be the best time of your life…but that's often not the case for many young people.
Government figures show that one in ten children of school age have a diagnosable mental health problem, including anxiety and depression.
The mental health charity, Young Minds, suggests that one in five show signs of an eating disorder.
In our latest update from Fixers - the campaign that gives young people a voice - a young Hampshire woman, who had severe depression and anxiety as a teenager, is on a mission to ensure schools support their pupils.
It's every parent's nightmare. Your teenager gets heavily involved in drugs, and you don't even know it's happening.
In the first of our new series from Fixers - the campaign that helps young people make a difference - we meet teenager Jade Clement who says cannabis nearly ruined her school career, and cut her off from family and friends.
With government figures showing that nearly a third of young people have tried cannabis, and new research suggesting it may damage teenagers' brains, she's warning that the drug is no joke.