http://en.wikipedia.org/wiki/Teen_drama
Typical conventions:
Editing - blurred transitions; dissolves; more adventurous.
Sound - non-diegetic music/sound; sound-bridges; music to represent emotion
Mise-en-scene - modern, contemporary; chaotic, colourful
Camera - close-ups for emotion; interesting use of camera work; isn't all realistic
Character - main protagonist - youth (always from their perspective); parents (negatively and stereotypically presented
Narrative - issues that interest young people (sex, drugs, alcohol, scientific, what's the world all about?.etc); each character has a different episode with a different issue (especially skins, being human and waterloo road.etc); humorous - ironic (black humour/dark), things that shouldn't really be laughed at, humour that older people can look back at things that used to happen and laugh, self-deppreciating (putting yourself down); issues that you experience, but makes you feel better, seeing other people dealing with those issues.