At least we get to see Pleasence in a mellow mood as a Mr Chips type (not somebody like that storm-causing guy in The Outer Limits or the Humpty Dumpty villain of Puma Man!). But the idea is an awfully sappy one. Odd that teachers seem to be the only ones on screen given to similarly piteous musings; how fortunate I suppose for the rest of us that we are spared the grief of such self-indulgences.
Also, one can't help but think (well, this one at least) that, along with all the high-toned words and ideals he passed along, perhaps he should've taught more of his students how to duck. ;)