Thank you for your clarification.
I agree with what you say here ...
I'm just thinking about it differently.
For my three children (12, 7, 7), an instrument, art, ballet and a sport are mandatory in the same way reading, writing, playing with math concepts, and talking about science are mandatory. Some days they don't feel like doing them, but we have a pep talk, and they suck it up and work with me, practice or go to class. These are all things we have decided they ought to do to help develop their brains and bodies. Someone else will have a different set of recommendations, and I'd rather keep government mandate out of arts and sports.
My children and I spend a lot of time talking about what options they want for the future, and what they need to do now to be prepared. With their goals in mind, they trust me to provide a structure that includes necessary skills, and they tell me when something isn't working so we can try a different approach. (I don't like getting a mix of thumbs-up and thumbs-down, but it's impossible to please everyone, so sometimes my answer is, "Since we're going to be doing x, you'll have a lot more fun if you choose to enjoy it.")
I think it's the pacing that really differs, and individual readiness is so varied. I wanted my kids to have the tools for reading, so we played with letter shapes and sounds and combinations to see how different sounds could be made over a couple of years. There was no deadline of when they would learn to read. Suddenly, about 6 months ago, every book in reach became fair game for my 7 yos. It was like providing bait: wonderful stories any time if they could read to themselves.
I can't get my kids to stop reading, since that's what they see modeled, and neither video or computer are an option during the day (except for mom -- and that's contentious). What to do? Build with Legos, Kapla blocks, play cars, marbles ... or read a book. I carefully choose reading material so they have to put good, interesting stuff in their brains. They can choose from hundreds of books on our shelves, plus the rotating library stacks, but they're not going to take in new information if all they read is Calvin & Hobbes for the 50th time, so it's a treat, like candy.
My daughter, 12, is in the process of writing a practice paper for her 5 paragraph writing assignment (from our charter school): "Why you should try to fail the writing assignment", including similes to providing Mozart with a bizarre structure of measures and notes instead of just letting him create. No, I didn't give her the topic. She was supposed to write about something she's learned recently. How that for what you should learn from school? She's great at putting ideas down on paper, having interviewed and written for our town's online magazine for two years, but did poorly on the assignment last year because her "persuasive essay" didn't follow the prescribed structure. We learn writing by reading the Wall Street Journal articles, and playing with words and ideas, not by writing 5 paragraph essays with three sentences in each paragraph. I'm convinced that could kill anyone's interest in writing.
Now I'm trying to figure out how to "bait" math. Science comes up in conversation all over (I'm a physicist), but math has been my tool, not a creative outlet. That's where naturalmath and the conversations here have been a light for me. My boys would be happy to do grade-level workbooks because they're easy, but it won't light a spark. My daughter does math because she knows she needs to, but it's not a passion. Being a physicist isn't contagious. Darn! But talking about physical concepts seeps into everything.
You asked a great question:
Don't really know how to make any of this work on a large scale.
I also have to cook, which isn't nearly as fun as thinking about learning. Guess I'd better not be a chef!