The suggestions are rather extreme but it is a good idea to eliminate gender stereotyping and segregation when it is not necessary and let kids be who they are (but make them smarter, more educated, confident and stronger).
"You're the only person that decides how far you'll go and what you're capable of." - Ben Saunders (Explorer and Endurance Athlete)
The PC mentality is just a couple of steps past nature and puberty. Explain it all you want, there is a day boys wake up with a stiffy and get interested in boobs. Adjust it all you like, you can not out pace biology. if we were all equal we would be extinct within a couple of generations.