Why not encourage ALL kids to be the best they can be?
If they want to be a parent, then be the best parent.
If they want to be a doctor, then be the best doctor.
If they want to be an astronaut, then be the best astronaut.
If you want to be a mother, be the best mother you can be.
If you want to cure cancer, .....
But why single out females?
Unless you're an ignorant sexist jerk, why not encourage everybody, who's just getting out of high school, to strive to be the best at whatever choice they make?