Are you actually implying that men are better teachers than women!? If you're going to make a statement like that you better have some facts to back it up.
It's completely possible that they are not. If they aren't then the neuroscience tells us that it's most likely cultural rather than biological but even that's only informed speculation at this point.
Talent is normally distributed, across both genders
I honestly would not have thought that. Women are better than men at many things and vice versa.
It's possible that 'teaching kids' is something that women are statistically better at than man.