A high school’s extra-curricular music programme is for the chop – though not if crusading biology teacher Scott Voss (Kevin James) can help it. He turns mixed martial arts fighter to raise $50,000. Knuckle-headed though this US comedy is, there’s no denying its lefty credentials. Repeatedly, we’re told of the value of the arts by Henry Winkler’s kind-hearted music teacher. The passion of heroic educators is a theme, with the American flag making multiple cameos. The movie thrums with social responsibility – in between barefoot canvas smackdowns.