Teachers are generally a good bunch. They do it for the love, I don't think there were more than a couple of teachers I didn't respect and like, even if I wasn't the best pupil, never a trouble maker, only mischief.. I don't hold with that old Bernard Shaw saying "He who can, does, he who cannot teaches". My dads a teacher a PE teacher (and his love of sport drives him to make sportsmen/women of all he can ) and a bloody good one too, this is born out by the fact that his nickname amongst the kids is "legend".
That guy looks a really nice one who I'm sure would have done his very best for his pupils.