seeker - thanks for your clarification btw. It's good to know that 5 year olds are not, in point of fact, being taught about doggy style and how to hire a hooker. 
Wouldn't it be a good idea if it was set out in a crystal clear way and given to parents?
At age 5, your child will be told x,y,z
at age 6, they will be taught this concept
at 7 they will begin to learn about such and such
and how it will be taught, what the aims will be, words used etc etc
Why isn't it? Do you know?
When my eldest was at primary school, they were starting sex ed and I watched the video and refused to let him participate because I felt it was inappropriate for his age and level of understanding. I bought a couple of books that I felt were more appropriate and went through it all myself.
What I saw in that video felt to me like the wrong approach. Which is probably why it was so easy for me to believe that it had gone further, and was indeed as all the papers and articles are reporting.
tbh, I am much more comfortable educating them about it myself. I can do it in the way that I think best and most appropriate for their level of understanding.
However, my eldest is now 12 and dies a thousand deaths if I try to discuss anything about sex
He walks away.
It doesn't stop him boasting how big his penis is getting now, though 
him "I'm having puberty. My penis is getting big. Look"
me "That's nice for you dear. Now put it away and come and have your breakfast."