Ideally.... Family first.
Then, (if they can ever get past the mass delusion of what is "beautiful" is) companies that will show men and women in a healthy form, not an anorexic version of attractive or pushing junk that won't help maintain a healthy form.
Schools last. To be honest, I'm becoming disillusioned by the ability of schools to teach our kids without getting too into the propaganda of the day. Schools don't seem to teach kids to learn and think critically. Kids are just expected to download the current dogma as fact. Which is why we have a society of sheep who choose to follow leaders blindly. And is also why we have teenage girls starving themselves to fit a misconceived notion of what "pretty" looks like.
Just my opinion though. Be well.