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 would improve teaching the same way it would improve software development: statistically. Talent is normally distributed, across both genders, meaning that external forces that repel one gender from a profession reduces the quality of the talent pool for that profession.
Do you know that to be true? Is talent at teaching really normally distributed across both genders?
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.
Actually I think this is a fair question. I think it's important to remove barriers and prejudices that prevent any person of a particular sex from being able to go into any field that they choose but I also think it's not straightforward to say that having a 50/50 split always leads to the optimal situation or that if a 50/50 split doesn't exist it automatically means there is some barrier or prejudice. I think it would be much better to focus on making sure that teachers going into the field are competent regardless of their sex.
I really enjoyed Peldi's talk last year. It was entertaining, educational, and inspiring.
My question for Peldi: You waited until the very end to quit your job at Adobe (4 days before launching, if I remember correctly). I'm currently struggling with this issue myself. If you had to do it over again, would you make the same decision, or would you quit sooner? Why?