Hereorthere, I never heard of men not giving a get because all they heard about was the aguna issue.
One way to start teaching about tznius better, is to make it less a focus of every single lesson. Sounds counterproductive right? But when you do speak about it, your audience will listen.
The first thing to do is to stop teaching that women cover themselves to help men. Start teaching frum kids the way that BTs are taught – about a woman’s beauty and how she has to protect it FOR HERSELF. Show young girls that if a woman values herself as an individual, she will value maintaining her modesty. Its important to empower women with tznius not devalue them. Woman are not just around to wait until a man comes along to marry them so they can have lots and lots of children. Girls need to understand that they are people with thougths, feelings and purpose INDEPENDANT of men.
And for the love of pete, never take out a ruler to measure her skirt when fitting her for a uniform.