Difficult to rate, because it's so stocked with good and bad material that measuring up a balance if the two seems impossible. For all The History Boys has to say about the schooling system, finding yourself, knowledge, and discovering your legacy, it's messages will always be muddied by the horrifically handled scenes of Richard Griffiths molesting his students.
There's actually a scene where another teacher's ponders about the outcomes of what might have happened had Griffith's not been caught, without ever concluding that actually, touching your students genitals as way of 'benediction' isn't an acceptable practice or form of teaching.
Not quite something I could look past unfortunately. The development of Dakin coming onto Irwin felt similarly creepy also. Mostly out of the way the film handled those advancements, rather than that kind of content being 'out of bounds'. It's a shame. This would have been a great film for Griffiths legacy as an actor.