It's hard to work out if Paul Green, the hyperactive star of this 'rockumentry', and head of the 'best rock school in Philadelphia' (and the East Coast, according to the maestro), has modelled himself on Jack Blacks manic creation or vice versa, such is the similarity of these two headbanger's. Both, while wanting to teach the kids to find their "inner rock star" when schools out, bring other human qualities to the table, something Mr Barford my old music teacher never did. I was lumbered with the Triangle in primary school to keep the posh kids in tempo in the more expensive string section. Well it was either that or the Recorder. I wonder who decided that the ubiquitous and monotonous Recorder was the best musical instrument to inspire kids.

The star of the movie is not the kids and their talent- precocious 'CJ' really rocking out at 11 years young on lead guitar-but Paul Green himself. The Peter Pan like character, a middle aged rocker (with the spread) that never grew up, is living the dream vicariously through the kids that have no choice but to look up to him. His teaching method is very much carrot and stick, but garners quiet respect from his students of mixed ability and attitude, the later an essential ingredient of being a rock star. You can't help but not secretly admire this guy as he does get the best out of them, but not too shy to say if they have it or not to their face, Gordon Ramsey style!

The Collins twins-two identical five-year-old blonde bombshell surfer boys with floppy fringes-don't seem to have much talent but just enjoy shouting a lot into the microphone, encouraged by their mum who also wanted to be a lead singer. Then there's 'CJ', the kid with the super fast fingers on the Gibson Sunburst. Then we have oddball but intelligent Will, only there for the company, enjoying teasing Paul when he's in a bad mood, his intellectual inferior it seems, but Will having zero musical ability to counter that ego, quickly assigned to play bass guitar. Our other star is Maddi, the female all-rounder that knows she's good and so needs to be regularly picked on and 'checked' by Paul. Teacher doesn't hold back when someone misses a chord or mucks up the intro, be it a slightly hammy rant to camera. If this school was in California I'm sure he would have his ass sued off!

Not only does he teach the 100 or so kids to rock out but also gets them gigs. One lot attempt some Sabbath at pub gig whilst others are assigned to far trickier tasks. Being a serious Frank Zappa fan he teaches them more sophisticated chords, banning anyone playing Cheryl Crowe or Purple Rain behind his back.