There is no accurate or useful 'profile' of students who engage in targeted school violence. Some come from good homes, some from bad. Some have good grades, some bad.

My parents were supportive. I didn't have good grades, but they could tell I wasn't lazy.

I got fairly good grades, but I was bad at woodwork. They said I tried hard, but the result was hopeless.

We are all in the business of sales. Teachers sell students on learning, parents sell their children on making good grades and behaving, and traditional salesmen sell their products.

I wasn't really a dark kid, but I was in my head a lot. I got good grades all through my 16 years of Catholic school, but I was always writing these weird - and, I have to say, really bad - stories, filled with murder.

My mum's always had big aspirations because I'm an academic. I always got good grades at school. GCSEs were just a breeze for me.