When my sons were ~10 I started paying them wages to do labor on the jobs I took them to. They had been sorta helping out anyway, as kids naturally do, and this greatly encouraged them to learn to be like adults, which kids want more than anything. I later was told by them that this was one of the most important scholastic undertakings for them, because it was a conduit for so much else besides packing boards to where they needed to be. When I was installing sheetrock, I had them measure boards for the cuts, and every pencil mark was a test, because once it was cut, their mark either passed (the board fit), or failed (the board didn't fit). It's also kinda tricky because the boards are marked and measured on the back, so everything has to be reversed in your head to properly mark out holes and cuts.
Because tape measures in the USA use the imperial system, fractions required simplification (they weren't all in tenths, like metric measurements, but in 1/2, 1/4, 1/8, and so on). This required them to learn algebra and basic multiplication and division of fractions, which is a solid foundation in maths, and they didn't learn theories but practical applications of the calculations that they then immediately saw to be right or wrong when the board fit or did not. I found it to be a very effective way for them to learn stuff that I struggled with learning from books in the classroom when I was in middle school.
I don't know if this will be useful to you, but I have been extremely gratified by the practical curriculum working labor on construction sites provided my kids. They were far in advance of their schooled peers, and only absorbed all the nonsense schools teach kids from their peers, which they naturally compared to the practical knowledge they knew was true from their experience in the real world. As a result my kids were naturally seen as leaders by their peers, and, while they weren't enrolled in classes, did participate in about every club and sport they could, like the debate team, bands, football (US), soccer (football in the rest of the world), and even student government. My eldest was captain of the football team and led our local school to participate in state wide competition for the first time in almost 50 years (it's a very small school). He was Homecoming King (a dance event the kids have after the football season), and etc. They enjoyed leading their peers in all these challenges and the recognition of their contributions when receiving awards and participating in the ceremonies.
This all kept me busy, because I had to be at all these events, but I still have the DVD of my kids singing in the school play 'Oklahoma', which amazes me to this day that they are so talented and such better men than I ever learned to be from my misery in public school.
I hope you can use these concepts to enable your family to achieve greater success than you have yourself. Little is more gratifying to a parent than to see your kids out-achieving anything you ever did, at least it has been to me.
Edit: plus, working for wages meant they had adult quantities of money, which I allowed them to spend on (approved by me) stuff they wanted. They bought 4x4's which they could drive on our compound innawoods on cat trails I'd driven. They loved driving their own trucks, albeit slowly because the cat trails were very crude, which also meant that when they made mistakes and crashed or got stuck, they did so at ~10mph and made it very hard for them to get hurt. However they had to pay for any parts and do all the work themselves, including winching their truck out when they got stuck. By the time they were old enough to drive on public roadways they were very unwilling to do anything stupid driving because they had learned all the ways it would cost them time, money, and lots of very hard work to fix.